The area of a sail is 40 1/2 square feet. The base and the height of the sail are equal. What is the height of the sail (in feet) ?

Both base and height of the sail is 40 1/2 feet.

A sail is triangular in shape. Finding the area of a triangle is multiplying its base and height and dividing the product by 2.

A = 1/2 bh

Area = 40 1/2 or 40.50 sq. ft

Since base and height are equal.

40.50 x 2 = 81

bh = 81

bh = 81 : 2

b = 40 1/2 ft

h = 40 1/2 ft