How long is the arc intersected by a central angle of Pi/2 radians in a circle with a radius of 4.5 cm? Round your answer to the nearest tenth. Use 3.14 for Pi 0 A)0.3cm B)0.7 C)2.9cm D)7.1cm

Question

mrnood · Answer

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when the angle (theta) is expressed in radians then you can use this formula for lenght of arc:

L = r(theta)

the question tell you
r= 4.5
theta = pi/2 = 3.14/2

so multiply thase 2 numbers to get your answer...