Conceptual Physics

(Sean Pound) #1

12.4 The 28 ft flagpole outside Martin Luther King,


Jr. Elementary School casts a 42 ft shadow. In
degrees, at what angle above the horizon is
the Sun? The diagram may not be to scale.
°

Section 13 - Radians


13.1 Find the radian measure of one of the angles of a regular pentagon. (The angles are all the same in a regular pentagon.) In


degrees, the formula for the sum of the interior angles of an n-sided polygon is (ní 2) ⋅ 180°.
radians

13.2 A right triangle has sides of length 1, 2 and the square root of 3. In radians, what is its smallest angle?


ʌ/3 radians


ʌ/6 radians


ʌ/12 radians


Copyright 2007 Kinetic Books Co. Chapter 1 Problems^23

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