The radian measure of a straight angle is equal to which value?

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Multiple Choice

The radian measure of a straight angle is equal to which value?

Explanation:
A straight angle spans half a full rotation, so in radians it covers half of 2π, which is π radians. Since a straight angle is 180 degrees, and 180 degrees equals π radians, that is the correct measure. The other values correspond to smaller angles: π/2 is 90 degrees (a right angle), π/3 is 60 degrees, and 0 is no rotation at all.

A straight angle spans half a full rotation, so in radians it covers half of 2π, which is π radians. Since a straight angle is 180 degrees, and 180 degrees equals π radians, that is the correct measure. The other values correspond to smaller angles: π/2 is 90 degrees (a right angle), π/3 is 60 degrees, and 0 is no rotation at all.

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