Term
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Definition
| Points that are in a line |
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Definition
| Is a flat surface or a 2-dimensional object, stretching to infinity in all directions. |
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Definition
| Points that are on the same plane |
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Term
| How many points do you need to make a point? |
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Definition
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Term
| To make a plane, you need.... |
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Definition
| You need three non-collinear points to make a plane. |
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Term
| If two lines intersect, then they intersect in _ points |
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Definition
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Term
| If two planes intersect, then they intersect in _ points |
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Definition
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Definition
| Always two endpoints. Has infinite number of points in between ends of this. |
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Term
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Definition
| One endpoint forever in one direction, the other doesn't go on. |
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Term
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Definition
| Two collinear rays with the same endpoint. |
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Term
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Definition
| Lines that do not lie in the same plane (non-coplanar) that never intersect. |
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Term
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Definition
| A ____ is formed by two rays and a endpoint. Rays are sides of _____. The end is the vertex of the ______. |
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Term
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Definition
| Angle that is less than 90 degrees |
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Term
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Definition
| Angle that is exactly 90 degrees |
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Term
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Definition
| More than 90 degrees, but less than 180 degrees. |
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Term
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Definition
| Two angles whose sides are opposite rays. |
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Term
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Definition
| Adjacent angles are angles just next to each other. Adjacent angles share a common vertex and a common side, but do not overlap. |
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Term
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Definition
| Two angles whose measures have a sum of 90 degrees. |
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Term
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Definition
| Two angles that add up to 180 altogether. |
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Term
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Definition
| Same position on each line. |
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Term
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Definition
-If a transversal intersects two //
lines⇒corresponding angles are ≅
-If a transversal intersects two //
lines⇒alternate interior angles are ≅
-If a transversal intersects two //
lines⇒alternate interior angles are ≅
-If a transversal intersects two //
lines⇒alternate exterior angles are ≅
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If a transversal intersects two //
lines⇒same side interior angles are
supplementary.
-If a transversal intersects two //
lines⇒same side exterior angles are
supplementary. |
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Term
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Definition
| Have congruent corresponding parts and all angles and sides are congruent. |
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Term
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Definition
| Shapes are congruent from before to after. No changes. |
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Term
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Definition
| Know two angles, and you can assume that the third angle is congruent. |
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Term
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Definition
| Corresponding Parts of Congruent Triangles are Congruent. |
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Term
| Isosceles Triangle Theorem |
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Definition
| If two sides of a triangle are congruent, then the angles opposite of those are congruent. |
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Term
| If 2 angles of a triangle are congruent, then the sides opposite are are congruent |
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Definition
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Term
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Definition
| In a right triangle, if you have a hypotenuse and legs are congruent. |
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Definition
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Definition
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Definition
| At least two sides congruent. |
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Definition
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Term
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Definition
| When three or more lines intersect |
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Term
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Definition
| The point where the three lines intersect. |
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Term
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Definition
| Starts at vertex and ends at midpoint of opposite sides. 3 ____ in a triangle. |
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Term
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Definition
| Starts at vertex and hits opposite sides at right angles. ______ can be outside of triangle. |
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Term
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Definition
| Starts at vertex and _____ vertex angle. |
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Term
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Definition
| Does not have to start at vertex. Starts at midpoint of base and makes right angles. |
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Term
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Definition
| Point of concurrency for median isosceles triangles. |
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Term
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Definition
| All alternate lines meet up at middle of isosceles triangle. For altitudes. |
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Term
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Definition
| Perpendicular bisector point of concurrency. |
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Term
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Definition
| Angle bisector point of concurrency. |
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Definition
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Term
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Definition
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Term
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Definition
| Is a quadrilateral with both pairs of opposite sides parallel. |
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Term
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Definition
| Is a parallelogram with 4 congruent sides. |
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Term
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Definition
| Is a parallelogram with 4 right angles. |
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Term
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Definition
| Is a parallelogram with 4 congruent sides and right angles. |
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Term
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Definition
| Is a quadrilateral with two pairs of adjacent sides congruent and no opposite sides congruent. |
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Term
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Definition
| Is a quadrilateral with exactly one pair of parallel sides. |
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Term
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Definition
| Is a ____ whose non-parallel sides are congruent. |
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Term
| Properties of Parallelograms |
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Definition
-Opposite sides are congruent.
- Opposite angles are congruent.
- Consecutive angles are supplementary.
- One pair of opposite sides are both parallel and congruent.
- Diagonals bisect each other. |
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Term
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Definition
-All sides congruent.
-Each diagonal bisects opposite angles.
-Diagonals are perpendicular |
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Term
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Definition
-Opposite sides are congruent.
-Opposite angles are congruent.
-Same sides angles are supplementary.
-Diagonals bisect each other.
-4 right angles
-Diagonals are congruent. |
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Term
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Definition
-All sides congruent.
-Each diagonal bisects opposite angles.
-Diagonals are perpendicular
-Opposite sides are congruent.
-Opposite angles are congruent.
-Same side angles are supplementary.
-Diagonals bisect eachother.
-4 right angles
-Diagonals are congruent.
-Opposite sides are congruent.
-Opposite angles are supplementary.
-Consecutive angles are supplementary.
-Diagonals bisect each other.
-One pair of opposite sides are both parallel and congruent. |
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Term
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Definition
Only one pair of opposite sides are parallel (bases).
2 angles that share a leg are supplementary. |
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Term
| Isosceles Trapezoid Properties |
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Definition
Legs are congruent.
Base angles are congruent.
Diagonals are congruent. |
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Term
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Definition
-Two pairs of consecutive sides are congruent.
-No pairs of opposite sides are congruent.
-Diagonals are perpendicular.
-One diagonal bisects opposite angles.
-One diagonal divides into two congruent triangles.
-Other diagonal divides into two isosceles triangles. |
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Term
| Polygons are similar if... |
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Definition
| If corresponding angles and sides are proportional |
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