An automobile windshield wiper 7 inches long rotates through an angle of 60 ∘ . If the rubber part of the blade covers only the last 6 inches of the wiper, find the area of the windshield cleaned by the windshield wiper.

25.13 square inch

Step-by-step explanation:

The automobile windshield wiper 7 inches long rotates through an angle of 60 degrees.

Note that the rubber part covers only the last 6 inches of the wiper.

To find the area of the windshield cleaned by the wiper,

We find the area of the annulus shaded in grey in the diagram.

Area of a Sector=

For the larger sector, Radius, R=7cm

For the smaller Sector, radius r=1cm

Area cleaned by the wiper

The area cleaned by the wiper is 25.13 square inch.

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.

step-by-step explanation:

at each of the parallel lines adjacent angles are supplementary. the angles have special names identifying their positions with respect to the parallel lines and transversal. they are corresponding angles, alternate interior angles, or alternate exterior angles. an angles is congruent to its matched angle.