You wonder how many cars there are in your area. you call up the ford dealership and ask how many fords they’ve sold. they report that they’ve sold a total of 15,000 cars. you then take a lawn chair and camp out on a busy road and count cars. you count 1200 cars and note that 700 of them are fords. estimate the number of cars in your area.

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq