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| Greater than 90 degrees but less than 180 degrees |
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| Opposite angles formed by intersecting lines. Vertical angles are congruent. |
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| Have the same vertex, share a common side, and do not overlap. |
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| The sum of the two angles is 90 degrees. |
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| The sum of the angles is 180 degrees. |
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| Intersect at right angles. |
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| A line that intersects two or more other lines. |
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| A figure formed by three line segments that intersect only at their endpoints. |
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| At least two congruent sides. |
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In a right triangle, the square of the length of the hypotenuse c is equal to the sum of the squares of the lengths of the legs a and b.
a2+b2=c2 |
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| A polygon that has 4 sides and 4 angles |
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| A quadrilateral with one pair of parallel opposite sides. |
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| A quadrilateral with both pairs of opposite sides parallel and congruent. |
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| Parallelogram with 4 right angles. |
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| A parallelogram with 4 congruent sides. |
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| A parallelogram with 4 congruent sides and 4 right angles. |
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| A closed figure formed by three or more line segments |
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| Polygons that have the same size and shape. |
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| The fold line in a figure that has line symmetry. |
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| When a figure can be folded over a line so that one half of the figure matches the other half. |
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| A figure that can be rotated or turned less than 360 degrees about its center so that the figure looks exactly as it does in its original position. |
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| The degree measure of the angle through which the figure is rotated. |
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| The mirror image produced by flipping a figure over a line. |
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| The line a figures is flipped over in a reflection. |
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| Mapping of a geometric figure. |
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| The movement of a figure to one position to another without turning it (slide). |
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| A transformation involving the turning or spinning of a figure around a fixed point. |
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| THe point in which a figure is rotated around. |
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| The degree measure of the angle through which a figure is rotated. |
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| Any side of a parallelogram |
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| The height of a parallelogram. It is a line segment that is perpendicular to the base with endpoints on the base and the side opposite the base. |
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| A set of points in a plane that are the same distance from any given point in the plane. |
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| The given point in which all points on a circle are the same distance. |
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| The distance from the center to any point on the circle. |
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| The distance across the circle through the center. |
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| The distance around the circle. |
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| The ratio of the circumference of a circle to its diameter. 3.1415926.... or just 3.14. |
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| A figure made up of two or more shapes. |
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| A two-dimensional flat surface that extends in all directions. |
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| A three dimensional figure formed by intersecting planes. |
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| A solid with flat surfaces that are polygons. |
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| The intersection of planes on a three dimensional figure. |
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| A flat surface (side) on a three dimensional figure. |
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| Where three of more planes intersect at a point on a three dimensional figure. |
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| A polyhedron with two parallel, congruent faces. |
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| A polyhedron with one base that is a polygon and faces that are triangles. |
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| The measure of space occupied by a solid. units3 |
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| A solid whose bases are congruent, parallel circles, connected with a curved side. |
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| A solid made up of more than one solid. |
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| A three-dimensional figure with one circular base. A curved surface connects the base and the vertex. |
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| The total area (find the sum) of all of the faces. |
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| The triangular sides of a pyramid. |
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| The altitude or height of each lateral face. |
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| The sum of the areas of the lateral faces. |
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