Understanding Circles: A Comprehensive Quiz

What is the radius of a circle if its diameter is 16 cm?

• 4 cm

• 16 cm

• 8 cm

• 32 cm

What is the relationship between the diameter and the radius of a circle?

• Diameter is half the radius

• Diameter is four times the radius

• Diameter is equal to the radius

• Diameter is twice the radius

If the diameter of a circle is 10 cm, what is its circumference?

• 5π cm

• 20π cm

• 15π cm

• 10π cm

A circle has a radius of 3 cm. What is its area?

• 12π cm²

• 18π cm²

• 6π cm²

• 9π cm²

Calculate the area of a sector with a central angle of 90 degrees in a circle of radius 4 cm?

• 2π cm²

• 4π cm²

• π cm²

• 8π cm²

What is the length of the arc for a 150-degree sector in a circle with a radius of 7 inches?

• 28π/6 inches

• 14π/6 inches

• 21π/6 inches

• 35π/6 inches

What is the measure of an inscribed angle if the intercepted arc is 100 degrees?

• 25 degrees

• 100 degrees

• 200 degrees

• 50 degrees

If a chord that passes through the center of a circle is 14 cm long, what is the radius?

• 28 cm

• 3.5 cm

• 14 cm

• 7 cm

In a circle, if the inscribed angle is 30 degrees, what is the measure of the intercepted arc?

• 30 degrees

• 60 degrees

• 15 degrees

• 120 degrees

If the circumference of a circle is 56.55 units, what is the radius?

• 28 units

• 4.5 units

• 18 units

• 9 units