To a rocking tune of Old McDonald Had a Farm, this video features students singing a simple song that teaches acute, obtuse, and right angles. Students form the angles with their hands. (01:04)

Compare attributes of two-dimensional shapes (square, rectangle, triangle, and circle). Identify the properties of two dimensional figures using appropriate terminology.

This is a rap song about angles. The song explains acute, right, and obtuse angles. The animations of the angles are clear. This would be a fun introduction to angles. (01:56)

This is a video lesson introducing right angles. Larry shows a a picture of a right angle and explains how it is defined and how to recognize it. (01:34)

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