1. Pet exercise Area (triangle):
2.Vegetable Garden Area (small rectangle):
3.TOTAL Backyard Area (large rectangle):

Part 1)

Part 2)

Part 3)

Step-by-step explanation:

Part 1) Find Pet exercise Area

we know that

The Pet exercise Area is equal to the area of a triangle

The area of a triangle is equal to

we have

substitute

Part 2) Find Vegetable Garden Area (small rectangle):

we know that

The Vegetable Garden Area is equal to the area of a rectangle

The area of rectangle is equal to

we have

substitute

Part 3) Find TOTAL Backyard Area (large rectangle)

we know that

The TOTAL Backyard Area is equal to the area of a rectangle

The area of rectangle is equal to

we have

substitute

you can not drow on this

step-by-step explanation:

because they could drop even lower..