A car‘s rear windshield wiper rotates 135°. The total length of the wiper mechanism is 21 inches and wipes the windshield over a distance of 13 inches. Find the area covered by the wiper. (Round your answer to one decimal place.)
The handle will be on 1/2 of the wiper the wiper will cover and area between two circles, or part of circles the upper edge and the lower edge of the wiper and the handle will make an arc itself if you draw an arc of 135? of the handle, the wiper will cover the same central angle arc the cover area by the wiper section area of the upper edge - section area of the lower edge of the wiper radius of the upper edge R 21+( 13/2) radius of the lower edge r 21- (13/2) Sector S, Area A (n/360)r?π[ n degrees of the segment] plug in to the formula then solve for A of R and A of R the difference A(R) - A(r) is the answer.
