Equilateral Triangle and Circle Geometry Quiz

What is the formula for the circumference of a circle?

• C = 2r

• C = πd

• C = πr²

• C = 2πr

In an equilateral triangle inscribed in a circle, what is the measure of each angle?

• 90°

• 60°

• 45°

• 120°

What is the value of sine 30° used in the calculations?

• 1/2

• 1

• √3/2

• 0

How do you calculate the length of one side of the equilateral triangle from the value of x?

• Multiply x by 2

• Add 2 to x

• Multiply x by 3

• Divide x by 2

What is the perimeter of the equilateral triangle?

• 8√3 units

• 16 units

• 24 units

• 24√3 units