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24 Cards in this Set
- Front
- Back
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SSS Postulate |
Two triangles are congruent if the 3 sets of corresponding sides are congruent. Stands for Side-Side-Side |
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SAS Postulate |
Two triangles are congruent if 2 sides and the angle in between on one triangle are congruent to 2 sides and the included angle of another triangle. Stands for Side-Angle-Side |
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ASA Postulate |
Two triangles are congruent if 2 angles and the side in between them on one triangle are congruent to 2 angles and the side in between of another triangle. Stands for Angle-Side-Angle |
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AAS Theorem |
If 2 angles and a non-included side of one triangle are congruent to 2 angles and a non-included of another triangle. Stands for Angle-Angle-Side |
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HL Theorem |
Two RIGHT triangles are congruent if the hypotenuse and a leg of a right triangle are congruent to the hypotenuse and a leg of another right triangle. Stands for Hypotenuse-Leg |
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Congruent Figures |
Figures that have the same size and shape. |
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Congruency Transformations |
Transformations that result in congruent figures: Translations, Reflections, and Rotations |
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Corresponding Angles |
Angle pairs in the same corners but on different parallel lines.
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Alternate Interior Angles |
Angle pairs on the inside of the parallel lines and opposite sides of the transversal. |
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Alternate Exterior Angles |
Angle pairs on the outside of the parallel lines and opposite sides of the transversal. |
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Equilateral Triangle |
Triangle with three sides of equal length and three angles of equal measure. |
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Isosceles Triangle |
Triangle with two sides of equal measure and congruent base angles. |
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Scalene Triangle |
Triangle with 3 different side lengths. |
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Obtuse Triangle |
Triangle with one angle larger than 90°. |
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Right Triangle |
Triangle with one 90° angle. |
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Acute Triangle |
Triangle with three angles less than 90°. |
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Triangle Angle Sum Theorem |
The angles of any triangle add up to 180°. |
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Perpendicular Bisector |
A line that divides a line segment into two equal parts. It also makes a right angle with the line segment. |
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Transversal |
A line that cuts through two or more lines. |
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Supplementary Angles |
Angles whose measures add up to 180°. |
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Complementary Angles |
Angles that add up to 90°. Together they form a right angle. |
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Vertical Angles |
The opposite angles created by 2 intersecting lines are congruent. |
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Adjacent Angles |
Two angles that share a side and vertex. |
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Congruent Angles |
Angles with equal measure. |
