Review Unit 12

This is an exact location in space.

• Line segment

• Point

• Ray

• Angle

What is a part of a line that includes two points called endpoints?

• Ray

• Line

• Point

• Line segment

What is a line with one end point that goes on and on forever in one direction called?

• Line segment

• Ray

• Point

• Parallel lines

Angle

• …is made up of rays, lines, or line segments and meet at a common (or one) point.

• Lines that never cross, even if they go on forever.

• Lines that cross and make a right angle (90 degrees). Think about them making a t when they cross!

• A straight row of points that starts

  at one point and goes on forever in ONE direction.

Acute Angle

• An angle that measure less than 90 degrees.

• An angle that measures greater than 90 degrees

• An angle that measures exactly 90 degrees.

Obtuse Angle

• An angle that measures greater than 90 degrees

• An angle that measures exactly 90 degrees.

• An angle that measure less than 90 degrees.

Right Angle

• An angle that measures exactly 90 degrees.

• An angle that measures greater than 90 degrees

• An angle that measure less than 90 degrees.

A triangle with one 90 degree right angle.

• Acute Triangle

• Right Triangle

• Obtuse Triangle

• Equilateral Triangle

Two angles that sum to 180 degrees.

• Complimentary Angles

• Supplementary Angles

• Right Angles

• Obtuse Angles

An angle that measures greater than 90 degrees.

• Complimentary Angles

• Straight Angle

• Right Angle

• Obtuse Angle