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6 Cards in this Set
- Front
- Back
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Auxiliary Line
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A line that is added in figures to aid in proof.
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Triangle Sum Theorem
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The sum of the angle measures of a triangle is 180 degrees.
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Formula for Finding Interior Angles of Polygons
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(n - 2)180○
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Interior Angle
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Formed by two sides of a triangle.
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Exterior Angle
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Formed by one side of the triangle and the extension of an adjacent side.
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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 its remote interior angles.
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