CPM Homework Help : INT2 Problem 1-8

Angela has a rectangular piece of paper and cuts a rectangle out of a corner as shown at right. What are the area and perimeter of the resulting shape?

Hint:

Perimeter is the distance around the exterior of a figure.

Area is the number of 'squares' needed to cover the interior of a figure.

Divide this shape into smaller rectangles to find the area.

Answer for Perimeter:

$6+7+15+9+21+16=74 \text{ cm}$

An enclosed figure starting at the upper left corner: right 6 centimeter, down 7 centimeter, right 15 centimeter, down 9 centimeter, left 21 centimeter, up 16 centimeter to enclose the figure.