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1.) radius = 12 cm *
a. 452.16 sq.cm
b. 45.216 sq.cm
c. 452.6 sq.cm
2.) radius = 3 m *
a. 26.28 sq.m
b. 28.26 sq.m
c. 2.826 sq.m
3.) radius = 6 km *
a. 112.04 sq. km
b. 113.04 sq. km
c. 115.04 sq. km
4.) radius = 7 in *
a. 153.86 sq. in
b. 154.86 sq. in
c. 153.68 sq. in
5.) radius = 10 mm *
a. 3.14 sq. mm
b. 314 sq. mm
c. 31.4 sq. mm
1.) radius = 12 cm *
a. 452.16 sq.cm
b. 45.216 sq.cm
c. 452.6 sq.cm
2.) radius = 3 m *
a. 26.28 sq.m
b. 28.26 sq.m
c. 2.826 sq.m
3.) radius = 6 km *
a. 112.04 sq. km
b. 113.04 sq. km
c. 115.04 sq. km
4.) radius = 7 in *
a. 153.86 sq. in
b. 154.86 sq. in
c. 153.68 sq. in
5.) radius = 10 mm *
a. 3.14 sq. mm
b. 314 sq. mm
c. 31.4 sq. mm
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Answer:
1.C
2.A
3.B
4.B
5.B
Step-by-step explanation:
1. ≈38 and A. ≈113 . First you need to find the radius, the key term to find the radius is diameter=2⋅radius ; therefore the radius r is 122=6 inches
2.r = 3 d = 6 C = 18.9 A = πr2 = π(d2)2 A = C24π π = 3.1415 A = area C = circumference or perimeter r = radius, d = diameter
3.r = 6 d = 12 C = 37.7 A = πr2 = π(d2)2 A = C24π π = 3.1415 A = area C = circumference or perimeter r = radius, d = diameter
4.A circle of radius = 7 or diameter = 14 or circumference = 43.98 meters has an area of: 0.0001539 square kilometers (km²)
5.r= 10 d = 20 C = 62.8 A = πr2 = π(d2)2 A = C24π π = 3.1415 A = area C = circumference or perimeter r = radius, d = diameter