Back to Measure angles in whole-number degrees using a protractor — Problem 2 · Task Set 24
Exercises: Measuring and Sketching Angles Using a Protractor
Work through each section in order. Before you trust a scale reading, always classify
the angle by eye first -- acute, right, or obtuse -- and check that your reading agrees.
Grade 4·23 problems·~30 min·Common Core Math - Grade 4·standard·4-md-c-6
Work through problems with immediate feedback
A
Fluency Practice
1.
A protractor's baseline lies along one ray of an angle. That ray sits at 0 degrees on the outer scale this time. The second ray crosses the inner scale at 40 and the outer scale at 140. What is the angle's measure?