Video: Determining the Measure of an Angle Using the Protractor

Read off 𝑚∠𝐵𝐴𝐶 from the figure below.

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Video Transcript

Read off the measurement of angle 𝐵𝐴𝐶 from the figure below.

We are being asked to measure the angle 𝐵𝐴𝐶, which is this angle here marked in orange. We have to count the number of degrees from line 𝐴𝐵 to line 𝐴𝐶 using the protractor given. The base of the protractor is lined up with line 𝐴𝐵. And we have to start reading from zero. And we have to keep on counting around the protractor until we reach the point marked at 𝐶. We can count in 10s. 10, 20, 30, 40, 50, 60, 70, 80, 90. Then there are two more divisions. And each of these lines is worth one, 91, 92.

The measure of angle 𝐵𝐴𝐶 is 92 degrees.

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