A área do círculo mede 196 π cm². Qual a medida do seu raio?
2 answers:
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>
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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