Page 103 - Math Course 1 (Book 2)
P. 103
Polygons
Largest Area
Right Triangle
Use the Pythagorean Theorem to f nd the length of Each of the following shapes has a perimeter of
the hypotenuse. about 88 inches. Which one has the greatest area?
A. a rectangle with length of 26 inches and a width
2
2
c = a + b 2 Pythagorean Theorem of 18 inches
2
= 6 + 6 2 a = 6, b = 6
B. a square with side length of 22 inches
= 72 Simplify.
C = 72 Take the square root of each side. C. a right triangle with each leg length of 26 inches
≈ 8.49 Use a calculator. D. a circle with radius of 14 inches
P = a + b + c Perimeter of a triangle.
= 6 + 6 + 8.49 Substitution Answer
= 20.49 feet Simplify.
Rectangle
P = 2ℓ + 2w Perimeter of a rectangle
= 2(8) + 2(3) ℓ = 8, w = 3
= 22 feet Simplify.
The only shape for which Terri has enough tape is
the circle.
Answer B
Your Turn!
Find Perimeter and Area
A. Find the circumference to the nearest whole
number.
A. 16 m
B. 25 m
C. 50 m
D. 201 m
Answer
B. Find the area to the nearest whole number.
A. 50 m
B. 201 m
C. 256 m
D. 804 m
Answer
95
