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Geometry

# Circles - Area

What is the area of circle $$O$$, if circle $$O$$ has a radius of 14?

What is the radius of circle $$O$$, if we know that circle $$O$$ has an area of $$289 \pi$$ square units?

What is the area of a circle with circumference $$10\pi$$?

$$\Gamma_1$$ is a circle with area $$27$$. $$\Gamma_2$$ is a circle whose radius is 3 times the radius of $$\Gamma_1$$. What is the area of $$\Gamma_2$$?

What is the diameter of circle $$O$$, if we know that circle $$O$$ has an area of $$36 \pi$$ square units?

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