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Queenyorengo
Answered

6. The area of a circle is directly proportional to the square of its radius. If a circle with a radius of 9 cm has an area of 81 cm, what is the area of a circle with a radius of 13 cm?​

Sagot :

Stephanieselloga12go

Answer:

a) A=314 sq.cm c) A=113.04 sq.cm

b) A=78.5 sq.cm. d) A=113.04 sq.cm

Step-by-step explanation:

From the question, suppose x, and then A=x r^2

so 1,256=x. (40/2)^2=3.14

so a) r=10cm b) r=5cm

c) r=6cm. d) r=15cm

So A=3.14r^2

a) A=314 sq.cm. c) A=113.04 sq.cm

b) A=78.5 sq.cm. d) A=113.04 sq.cm

"/" = fraction

Step-by-step explanation:

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