CCSS 4.MD.5B (Common Core, 4th Grade): "An angle that turns through n one-degree angles is said to have an angle measure of n degrees." The worksheets below practice this standard. Each one is a free printable PDF with an answer key, comes in multiple versions, and can also be assigned digitally - no login or account needed.
Measurement and Data Geometric measurement: understand concepts of angle and measure angles.5Recognize angles as geometric shapes that are formed wherever two rays share a common endpoint, and understand concepts of angle measurement:bAn angle that turns through n one-degree angles is said to have an angle measure of n degrees.