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21 Cards in this Set
- Front
- Back
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Acute Triangle |
a triangle with all three angles acute |
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Equiangular Triangle |
a triangle in which all three angles are equal |
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Obtuse Triangle |
a triangle that has one angle that it obtuse |
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Equilateral Triangle |
a triangle in which all three sides are equal |
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Isosceles Triangle |
a triangle with at least two equal sides |
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Scalene Triangle |
a triangle that has three unequal sides |
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Exterior Angle |
the angle between a side of a rectilinear figure and an adjacent side extended outward |
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Remote Interior Angles |
the exterior angle must have a measure equal to the sum of the remaining angles, the remote interior angles |
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Corollary |
A statement that follows with little or no proof required from an already proven statement |
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Congruent Polygons |
Polygons are congruent when they have the same number of sides, and all corresponding sides and interior angles are congruent |
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Corresponding Parts |
Corresponding parts in a figure mean that the angles or sides are in the same relative position in each of the figures |
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Side-Side-Side Congruence |
Triangles are congruent if all three sides in one triangle are congruent to the corresponding sides in the other |
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Included Angle |
the angle between two sides of a triangle |
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Side-Angle-Side Congruence |
if two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then these two triangles are congruent |
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Included Side |
The common leg of two angles |
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Angle-Side-Angle Congruence |
Triangles are congruent if any two angles and their included side are equal in both triangles |
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Angle-Angle-Side Congruence |
Triangles are congruent if two pairs of corresponding angles and a pair of opposite sides are equal in both triangles |
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Legs of an Isosceles Triangle |
the two equal sides are called legs, and the third side is called the base |
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Vertex Angle |
the angle associated with a vertex of a polygon |
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Base Angles |
The base angle theorem states that in an isosceles triangle, the angles opposite the congruent sides are congruent |
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Coordinate Proofs |
a proof of a geometric theorem which uses "generalized" points on the Cartesian Plane to make an argument |
