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musiclover10045

Split it into two shapes a square and a triangle.

Square =  3 x 3 = 9

Triangle = 1/2 x base x height

The height would be the side of the square = 3

The base would be the length of the top line minus the length of the side of the square = 7-3 = 4

1/2 x 4 x 3 = 6

Total area = 6 + 9 = 15 square units.

ricchad

Answer:

15 sq. units

Step-by-step explanation:

area of a trapezoid = (a + b) * h/2

where a = 3,  b = 7,  h = 3

plugin values into the formula:

A = (3 + 7) * (3/2)

A = 15 sq. units.