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| Two rays sharing a common endpoint. Angles are typically measured in degrees or radians. |
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| An angle that has measure less than 90°. |
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| Two angles in a plane which share a common vertex and a common side but do not overlap. Angles 1 and 2 below are adjacent angles. |
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| The surface included within… needed to cover the surface. The area of a plane figure is the extent… of length squared. The SI unit of area is the square meter (m 2 ), which… square meter (m 2 ), which is the area of a square with sides measuring |
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| Point B is between points A and C if it is on the line segment connecting A and C. |
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| A line segment, line, or plane that divides a geometric figure into two congruent halves. |
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| A complete circular arc. Circumference also means the distance around the the outside of a circle. |
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| a pair of angles that add up to be 90 degrees |
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| when at least one of the interior angles is greater than 180 degrees |
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| A three dimensional figure with a single base tapering to an apex. The base can be any simple closed curve. Often the word cone refers to aright circular cone. |
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Definition
| Exactly equal in size and shape. Congruent sides or segments have the exact same length. Congruent angles have the exact same measure. For any set of congruent geometric figures, corresponding sides, angles, faces, etc. are congruent. |
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Term
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Definition
| An additional geometric figure that is constructed to assist in solving a problem or producing a proof. |
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| A set of points any of whose chords do not include any point that is not in the set. |
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Term
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Definition
| On the coordinate plane, the pair of numbers giving the location of a point (ordered pair). In three-dimensional coordinates, the triple of numbers giving the location of a point (ordered triple). In n-dimensional space, a sequence of n numbers written in parentheses |
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Definition
| Lying in the same plane. For example, any set of three points in space are coplanar. |
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Definition
| A can-shaped solid figure. |
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| A unit of angle measure equal to of a complete revolution. There are 360 degrees in a circle. Degrees are indicated by the ° symbol, so 35° means 35 degrees. |
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Definition
| A line segment between two points on the circle or sphere which passes through the center. The word diameter is also also refers to the length of this line segment. |
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Definition
| straight line along which two faces of a solid meet. |
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| A planar or solid surface |
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| The side of a right triangle opposite the right angle. Note: The hypotenuse is the longest side of a right triangle. |
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Definition
| the geometric figure formed by two points. A line is the straight path connecting two points and extending beyond the points in both directions. |
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Definition
| A pair of adjacent angles formed by intersecting lines. Angles 1 and 2 below are a linear pair. So are angles 2 and 4, angles 3 and 4, and angles 1 and 3. Linear pairs of angles are supplementary. |
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Definition
| All points between two given points (including the given points themselves). |
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| The point halfway between two given points. |
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| An angle that has measure more than 90° and less than 180°. |
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| when two line collide and two angles are formed |
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| Two rays with a common endpoints that form a straight line |
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| ongoing lines that never touch |
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Definition
| The distance around the outside of a plane figure. |
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Definition
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| A flat surface extending in all directions. Any three noncollinear points lie on one and only one plane |
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Definition
| The geometric figure formed at the intersection of two distinct lines. |
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Term
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Definition
| A closed plane figure for which all sides are line segments. |
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Definition
| A solid with no curved surfaces or edges. All faces are polygons and all edges are line segments. |
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Term
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Definition
| through any two points there is exactly one line |
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| A solid with parallel congruent bases which are both polygons. The bases must be oriented identically. |
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Definition
| process of solving a math problem theories |
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Term
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Definition
| a triangular base is called a tetrahedron. |
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Definition
| a line segment between the center and a point on the circle. |
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Definition
| A part of a line starting at a particular point and extending infinitely in one direction. |
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| angle that adds up to be 90 degrees |
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Definition
| in three dimensional space that do not intersect and are not parallel |
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Definition
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Definition
| Two angles that add up to 180°. |
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| a general conclusion that has been proved |
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Definition
| such as a point or a line, or plane, that is not mathematically defined using other known words, although there is a common understanding of what the word means |
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Term
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| is where the two rays making up the angle meet. |
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Term
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Definition
| angles opposite one another at the intersection of two lines. Vertical angles are congruent. |
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