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3 years ago

A área do círculo mede 196 π cm². Qual a medida do seu raio?

Mathematics

2 answers:

AleksandrR [38]3 years ago

8 0

Hey there!!

The area of a circle = πr²

The area is given as 196π

Hence,

196π = πr²

... r²= 196

... r = √196

... r = 14

<em>Hence, the radius is 14 cm. </em>

<em>Hope it helps!</em>

Rzqust [24]3 years ago

7 0

Answer:

Step-by-step explanation:

The area formula for a circle is A = pi*r^2. Solve this for the radius (raio):

r^2 = A / pi, or r = plus or minus √(A/pi).

Here, r = +√(A/pi) = +√( 196 pi cm^2 / pi ) = +7.9 cm.

Check: A = pi*r^2. Does pi*(7.9 cm)^2 = pi*196 cm^2? Yes.

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