Angle Size Comparer

Differentiates angle and angle size from shapes and contexts, and compares angle sizes. Recognizes right angles, and then equal angles of other measures, in different orientations. Compares simple turns. (Note that, without instruction, this and higher levels may not be achieved even by the end of the elementary grades.)


You may see this:

Linked Image to Sign In/Sign Up page

Other Examples:

  • Children hold many misconceptions about angles and angle measure. For example, “straight” may mean “no bend” but also “not up and down” (vertical).   
  • Many children correctly compare angles if all the line segments are the same length, but when the length of the line segments are different, less than half of primary grade students do so. Instead, they base their judgments on the length of the segments or the distance between their endpoints.   
  • Other misconceptions include children’s belief that a right angle is an angle that points to the right or that two right angles in different orientations are not equal. 
  • Says, “I put all the shapes that have right angles here, and all the ones that have bigger or smaller angles over there.”
  • Turns Logo turtle, using degree measurements.

Help your student become a(n) Angle Size Comparer

Activities challenge children to understand where the angle is and how you would measure it in a variety of situations (an angle on a shape, or of a shape turning, a ramp, door knob as it turns to the open the door). Without instruction, this and higher levels may not be achieved even by the end of the elementary grades.

Special Thanks To

Institute of Education Sciences
The research reported here was supported by the Institute of Education Sciences, U.S. Department of Education, through grant numbers R305K050157, R305A120813, R305A110188, and R305A150243. to the University of Denver. The opinions expressed are those of the authors and do not represent views of the Institute or the U.S. Department of Education.