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16 Cards in this Set
- Front
- Back
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triangle
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figure formed by three segments joining 3 non-collinnear points.
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vertex
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each of the 3 points joining the sides of a triangle
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adjacent sides
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two sides sharing a common vertex.
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legs
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the sides that form the right angle of a triangle
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hypotenuse
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side opposite of the right angle
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interior angles
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3 original angles in a triangle
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exterior angles
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angles that are adjacent to the interior angles
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Triangle sume theorem
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the sum of the measures of the interior angles of a triangle is 180*
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exterior angle theorem
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the measure of an exterior angle of a triangle is equal to the sum of the measures of the 2 non-adjacent interior angles
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corollary to a theorem
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a statement that can be easily proved using the theorem
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corollary theorem
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the acute angles of a right triangle are complimentary
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corresponding angles
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are congruent angles
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corresponding sides
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are congruent sides
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3rd angles theorem
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if 2 angles of 1 triangle are congruent to 2 angles of another triangle then the 3rd angles are also congruent
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base angles theorem
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if 2 sides of a triangle are congruent then the angles opposite them are congruent
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converse of the base angles theorem
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if 2 angles of a triangle are congruent then the sides opposite them are congruent
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