Continue your child’s math learning
Sign up for a FREE Splash Math account.
Signup with Email
Why parents choose Splash Math for their fourth graders?
Intelligently adapts to the way each child learns
Get coins for each correct answer and redeem coins for virtual pets
Monitor progress with iPhone app, weekly emails and detailed dashboards
Make an Angle Using a Protractor- 4th Grade Math
Make angles of specified measure (degrees) by rotating one arm (ray). Students also make angles that belong to categories like acute or obtuse angles, as well as special cases, such as right angle, straight angle etc.
Common Core Alignment
4.MD.5.aAn angle is measured with reference to a circle with its center at the common endpoint of the rays, by considering the fraction of the circular arc between the points where the two rays intersect the circle. An angle that turns through 1/360 of a circle is called a "one-degree angle," and can be used to measure angles.
4.MD.6Measure angles in whole-number degrees using a protractor. Sketch angles of specified measure.
4.MD.5.bAn angle that turns through n one-degree angles is said to have an angle measure of n degrees.