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sergiy2304 [10]
3 years ago
14

Suppose that circles A and B have a central angle measuring 100°. Additionally, the measure of the sector for circle A is 10π m2

and for circle B is 40π m2.If the radius of circle A is 6 m, what is the radius of circle B?
A) 8 m
B) 10 m
C) 12 m
D) 16 m
Mathematics
2 answers:
Kazeer [188]3 years ago
5 0

Answer:

OptionC

Step-by-step explanation:

A circle A has radius 6m.

One sector has area as 10 pi m^2

central angle = 100 degrees

Area of the sector = \frac{100}{360} \pi(6)^2

Area of sector in circle B = \frac{100}{360} \pi(r)^2

where r=radius of circle B

Hence ratio of these would be the ratio of square of radii

i.e.\frac{10}{40} =(\frac{6}{r} )^2\\\frac{1}{2} =\frac{6}{r} \\r=12 m

So radius of circle B = 12m

Option C is right

34kurt3 years ago
3 0
12 m

<span><span>10π</span><span>40π</span></span><span> = </span><span><span>62</span><span>x2</span></span>
x = 12

<span>When </span>circles<span> have the same </span>central<span> angle measure, the </span>ratio<span> of measure of the </span>sectors<span> is the same as the </span>ratio<span> of the radii </span>squared<span>.</span>
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