#### Answer

a.
Area = 486 sq ft
Perimeter = 108 ft
b.
Fence: perimeter
Grass seed: area

#### Work Step by Step

a.
Area
= ½ x base x height
= ½ x 36 x 27
= 486 sq ft
Perimeter
= 27 + 36 + 45
= 108 ft
b.
A fence would surround the yard
Grass seed would be planted throughout the area of the yard