A rectangular picture frame is made from one-inch-wide pieces of wood. The area of just the frame is 18 square inches, and one o
f the outer edges of the frame is 5 inches long. What is the sum of the lengths of the four interior edges of the frame?
2 answers:
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<u>Given:</u>
A composite shape consisting of three rectangles with different lengths and widths.
<u>To find:</u>
The area of the composite shape.
<u>Solution:</u>
To find the area of the composite shape we must add the areas of all the three rectangles.
The upper rectangle has a length of 8 inches and a width of 4 inches.
The area of a rectangle
The area of the upper rectangle in².
The middle rectangle has a length of inches and a width of
inches.
The area of the middle rectangle in².
The lower rectangle has a length of 8 inches and a width of 1.5 inches.
The area of the lower rectangle in².
The area of the composite shape in².
The composite shape has an area of 62 in² which is option 3.