Term
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Definition
| The sum of the measures of the interior angles of a triangle is 180 degrees. |
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Term
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Definition
| The measure of an exterior angle of a triangle is equal to the sum of the measures of the two nonadjacent interior angles. |
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Term
| Corollary to The Triangle Sum Theorem |
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Definition
| The acute angles of a right triangle are complementary. |
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Term
| Side-Side-Side (SSS) Congruence Postulate |
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Definition
| If three sides of one triangle are congruent to three sides of another triangle, then the two triangles are congruent. |
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Term
| Side-Angle-Side(SAS)Congruence Postulate |
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Definition
| If two sides and the included angle of one triangle are congruent to two sides and the included angle of a second triangle, then the two triangles are congruent. |
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Term
| Hypotenuse-Leg(HL) Congruence Theorem |
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Definition
| If the hypotenuse and a leg of a right triangle are congruent to the hypotenuse and a leg of a second right triangle then the two triangles are congruent. |
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Term
| Angle-Side-Angle (ASA) Congruence Postulate |
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Definition
| If two angles and the included side of one triangle are congruent to two angles and the included side of a second triangle, then the two triangles are congruent. |
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Term
| Base Angles Theorem (BAT) |
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Definition
| If two sides of a triangle are congruent then the angles opposite them are congruent. |
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Term
| Converse of Base Angles Theorem (ConBAT) |
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Definition
| If two angles of a triangle are congruent, then the sides opposite them are congruent. |
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Term
| Corollary to the Base Angles Theorem |
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Definition
| If a triangle is equillateral, then it is equillangular. |
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Term
| Corollary to the Converse of the Base Angles Theroem |
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Definition
| If a triangle is equillangular, then it is equillateral. |
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Term
| TRUE/FASLE: If two triangles have two congruent angles and one congruent side, they are congruent. |
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Definition
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Term
| TRUE/FALSE: A triangle can have three acute angles. |
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Definition
| FASLE: A triangle can only have two acute angles. |
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Term
| TRUE/FALSE: If two isoscles triangles have two sets of congruent legs, then the base angles are congruent. |
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Definition
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Term
| In a right triangle, the side opposite the right angle is called the _____ of the right triangle. |
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Definition
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