Find the area of a circle with a diameter of 16.

Find the area of a circle with a radius of 7.

The radius of a circle is . Give the area of the circle.

Give the ratio of the area of a circle that circumscribes an equilateral triangle to that of a circle that is inscribed inside the same triangle.

What is the area of a circle with a diameter of , rounded to the nearest whole number?

Give the area of a circle that is inscribed in an equilateral triangle with perimeter .

A central angle of a circle has a chord with length 7. Give the area of the circle.

Give the area of a circle that circumscribes a triangle whose longer leg has length .

Find the area of a circle with a radius of 5.

What is the area of a circle with a diameter equal to 6?