Geometry Vocabulary

Define Acute

• Less than 90
• Exactly 90
• Greater than 90 and less than 180
• Exactly 180

• isosceles triangle
• scalene triangle
• right triangle
• equilateral triangle

Two angles that sum to 180

• Supplementary

• Complementary

• Congruent

• Vertical Angles

part of a line between two points on the line (endpoints)

• ray

• line

• line segment

• point

Define Obtuse

• Less than 90
• Exactly 90
• Greater than 90 and less than 180
• Exactly 180

Corresponding Angles (regarding parallel lines)

• Same side, same position

• Same side, different position

• Adjacent

• Segment addition
• Congruent segments
• Circumcenter
• bisector

An angle whose measure is exactly 90 degrees.

• acute
• vertical
• right
• straight

an angle that measures greater than 90* but less than 180*

• acute angle

• obtuse angle

• straight angle

• right angle

• perpendicular bisector
• angle bisector
• line
• segment