4th Grade Geometry Review

Lines, Points, Rays

100

This is a straight path that continues on and on in both directions without ever ending.

What is a line

200

This is part of a line between 2 endpoints.

What is a line segment

300

This is a part of a line that has one endpoint and continues without end in one direction.

What is a ray.

400

A line segment, point, and ray are all part of this.

What is a line.

500

This divides a shape into two equal parts.

What is a line of symmetry

Angles

100

This is formed by two rays that meet at an endpoint.

What is an angle

200

This type of angle is exactly 90 degrees.

What is a right angle

300

This type of angle is more than 0 degrees, but less than 90 degrees.

What is an acute angle

400

This type of angle is between 91 degrees and 179 degrees.

What is an obtuse angle

500

Susan made an angle that measures 80 degrees. When she went to label her angle, she called it a right angle. Is she correct? How do you know?

No she is not correct. 80 degree angle would be an acute, not a right angle.