Geometry Concepts

Front

Vertical Angles

Back

A pair of non-adjacent angles formed by intersecting lines.

Front

Partition Postulate (angles)

Back

If C is a point in the interior of angle AOB, then m angleAOC + m angleCOB = mangle AOB

Angle parts add to equal a whole angle.

Front

Linear Pairs are

Back

supplementary

Front

Consecutive Adjacent Angles, such as the angle formed by the angles is a line.

Back

then the sum of all of the angle measures is 180 degrees

Front

Angles at a point

Back

The sum of the measures of all angeles formed by three or more rays with the same vertex and whose interiors do not overlap is 360 degrees.

Front

Triangle Angle Sum

Back

The sum of the three angle measures of any triangle is 180 degrees.

Front

Acute angles of a right triangle

Back

When one angle of a triangle is a right angle, the sum of the other two angles is 90 degrees.

Front

Exterior Angle Theorem

Back

The sum of the measures of two angles of a triangle equals the measure of the opposite exterior angle. (The two angles are also called "remote interior" angles.

Front

Base Angles of a isosceles Triangle

Back

The base angles of an isosceles triangle are equal in measure.

Front

Equilateral Triangle

Back

If all sides of a triangle are the same, all angles are also the same.