Proof Vocabulary Flashcards

This is the 1st half of the Geo quiz

Median

A line from a vertex that goes to the midpoint of the opposite side

Complementary angles

Two angles that add to 90 degrees

Obtuse triangle

A triangle with one angle that is greater than 90 degrees

Vertical angles

formed by interecting lines. They are congruent

Isosceles Triangle

A triangle with 2 congruent sides and 2 congruent angles

Angle Bisector

A ray that cuts an angle into 2 congruent angles

Perpendicular Bisector

A line that cuts a segment into 2 congruent segments and creates 90 degree angles with the segment

Congruent Triangles

2 triangles with congruent sides and congruent angles

Altitude

A line from a vertex that goes to the midpoint of the opposite side

Supplementary angles

2 angles that add to 180 degrees

Perpendicular Lines

Two lines that intersect and create 90 degree angles

Acute Angle

An angle with a degree measure that is less than 90 degrees

Equilateral Triangle

A triangle with all sides congruent

Right triangle

A triangle with a 90 degree angle

Segment bisector

A line that cuts a segment into 2 congruent segments