Geometry Vocab Test

Obtuse Angle

An angle that measures greater than 90 degrees but less than 180.

Acute Angle

An angle that measures less than 90 degrees.

Adjacent Angles

Angle pairs that share a ray. (side by side)

Vertical Angles Theorem

If two angles are vertical angles, then they have equal measures.

Complementary Angles

Two positive angles that together form a right angle (90 degrees) are called complementary angles.

Angle Bisector

Bm is an angle bisector.

Reflex Angle

An angle greater than 180 degrees.

Right Angle

An angle is that measures exactly 90 degrees.

Straight Angle

An angle of exactly 180 degrees

Linear Pair Postulate

If two positive angles form a linear pair, then they are supplementary (180 degrees)

Congruent

Same

The Protractor Postulate

The measure of the angle is the absolute value of the difference of the real numbers paired with the sides of the angle, because the parts of angles formed by rays between the sides of a linear pair add to the whole, 180 degrees.

Supplementary Angles

When added together, the measures of these angles is 180 degrees, forming a linear pair.