The figure shows a kite inside a rectangle. which expression represents the area of the shaded region?

Step-by-step explanation:

we know that

The area of the shaded region is equal to the area of the rectangle minus the area of a kite

Step 1

Find the area of the rectangle

The area of the rectangle is equal to

In this problem we have

substitute

Step 2

Find the area of a kite

The area of a kite is equal to

where D1 and D2 are the diagonals of a kite

In this problem we have

substitute

Step 3

Find the area of the shaded region

for any of you who need the translation here it is

step-by-step explanation:

find the angular size of the equatorial radius of the earth, if the horizontal parallax of the sun