1. Perimeter and Area of Rectangles on the Coordinate Plane
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2. Warm Up Find the area of each rectangle. 48cm2 30cm2 264cm2 108cm2 6cm1. 2.
10cm
48cm2
30cm2
8cm
3cm
9cm
108cm2
22cm
264cm2 3. 4.
12cm
12cm

3. Example 1: Find the perimeter of the rectangle with the coordinates
(-1,8), (2,8), (-1,2), (2,2).
Graph the ordered pairs on the coordinate plane.

4. Add the sides.
6 units
= 18 units
3 units

5. Example 2: Find the area of the figure with the coordinates
(-1,8), (2,8), (-1,2), (2,2).
Graph the ordered pairs on the coordinate plane.

6. A = 6 x 3 = 18 units2 The figure is a rectangle so use the formula
A = length x width.
A = 6 x 3 = 18 units2

7. Example 3: Find the perimeter and area of the rectangle with coordinates
(-4, -2), (-4, -6), (3, -2), (3, -6).
You can find the distance between the points without graphing.
Distance between (-4, -2) and (-4, -6) = 4 units
Distance between (-4, -2) and (3, -2) = 7 units

8. Perimeter = = 22 units
Area = 4 x 7 = 28 units2

9. Practice
Find the perimeter and area of the rectangles with the coordinates
(-2, 4), (-3, 4), (-2, 6), (-3, 6).
P = = 6 units
A = 1 x 2 = 2 units2

10. Closure P = 4 + 4 + 6 + 6 = 20 units A = 4 x 6 = 24 units2
Find the perimeter and area of the rectangle with coordinates of
(-2,5), (4, 5), (-2, 1), (4, 1).
P = = 20 units
A = 4 x 6 = 24 units2