reasons for geometry proofs

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14 Terms

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Midpoint

A midpoint divides a segment into 2 congruent segments

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Segment bisector

A segment bisector divides a segment into 2 congruent segments

3
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Angle bisector

An angle bisector divides an angle into 2 congruent angles

4
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Perpendicular lines

Perpendicular lines form congruent right angles

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Right angles

All right angles are congruent

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Perpendicular bisector

Perpendicular lines form congruent right angles

A segment bisector divides a segment into 2 congruent segments

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Intersecting lines

Intersecting lines form congruent vertical angles

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Verticals angles

Verticals angles are congruent

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Isosceles triangles

If 2 sides of a triangle are congruent then their opposite angles are congruent

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Parallel lines

Parallel lines form congruent alternate interior angles

Parallel lines form congruent corresponding angles

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Supplementary angles

If 2 angles form a linear pair then they are supplementary

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Complementary angles

If 2 angles form a right angle then they are complementary

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Median

A median is a segment drawn from a vertex of a triangle to the midpoint of the opposite side

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Altitude

Altitude is a segment drawn from a vertex of a triangle perpendicular to the opposite side