The last answer was very accurate...but simplify it by using the concept of triangles. A rectangle is nothing but two identical triangles put together...

Find the area of the rectangle and then cut it in half...

10(9) = 90 that is the area of the rectangle. Now divide by 2.

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The last answer was very accurate...but simplify it by using the concept of triangles. A rectangle is nothing but two identical triangles put together...

Find the area of the rectangle and then cut it in half...

10(9) = 90 that is the area of the rectangle. Now divide by 2.

90 /2 is 45. Your answer is 45.

The formula for the area of a rect. is A = LW and for a triangle it is 1/2 times LW = A

Good luck...