Page 101 - Math Course 1 (Book 2)

Polygons

Perimeter and Area on the Coordinate Plane

Find the perimeter of quadrilateral WXYZ with W(2, 4), X(–3, 3), Y(–1, 0), and Z(3, –1).
A. 17.9
B. 22
C. 13.3
D. 9.1

Answer

MO. 9 - L6a area
is the sum of the length of the sides of the polygon.
Finding the Perimeter, Circumference
and Area of Polygons
w Area A = lw
Vocabulary A-Z

Let us learn some vocabulary l

Let’s Begin
perimeter
is the sum of the length of the sides of the polygon.

Find Perimeter and Area
c d
h
Examples

b
Perimeter P = b + c + d A. Find the perimeter and area of the f gure.

circumference
is the distance around the circle.
2.3 cm

c = πd
4.6 cm
r diameter
P = 2ℓ + 2w Perimeter of a rectangle
r is the r = 2(4.6) + 2(3.3) ℓ = 4.6, w = 2.3
radius r
= 13.8 Simplify.
c = 2πr
The perimeter of the
Answer
Circumference C = 2πr rectangle is 13.8 cm.

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