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Common Core Standard 4.MD.C.5a Questions

An 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.

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Grade 4 Angles CCSS: 4.MD.C.5a
Approximate the measure of the angle shown.
270° Reflex Angle
  1. 60 degrees
  2. 270 degrees
  3. 75 degrees
  4. 100 degrees
Grade 4 Angles CCSS: 4.MD.C.5, 4.MD.C.5a, MP5
What fraction of a circle does the angle turn through?
Protractor 0° to 45°
  1. 45180
  2. 135180
  3. 45360
  4. 135360
Grade 4 Angles CCSS: 4.MD.C.5, 4.MD.C.5a
What fraction of a circle does the angle appear to turn through?
270° Reflex Angle
  1. 90360
  2. 180360
  3. 270360
  4. 360360
Grade 4 Angles CCSS: 4.MD.C.5, 4.MD.C.5a, MP5
What fraction of a circle does the angle turn through?
Protractor 0° to 110°
  1. 70180
  2. 70360
  3. 110180
  4. 110360
Grade 4 Angles CCSS: 4.MD.C.5, 4.MD.C.5a, MP2
Angle A measures 15°. Angle B measures 50°. Which statement is true about the angles?
  1. Angle A turns through 15 1-degree angles.
  2. Angle B turns through 50 10-degree angles.
  3. Angle A turns through 15180 of a circle.
  4. Angle B turns through 50180 of a circle.
Grade 4 Angles CCSS: 4.MD.C.5, 4.MD.C.5a, 4.MD.C.5b
Which statement is true for a 100° angle?
  1. The angle is acute.
  2. The angle is a right angle.
  3. The angle is 10360 of a circle.
  4. The angle turns though 100 1-degree angles.

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