Understanding Circles

What tool is used to draw a circle?

• Eraser

• Protractor

• Compass

• Ruler

What is the term used to describe the distance from the center of a circle to any point on its edge?

• Diameter

• Area

• Circumference

• Radius

How is the diameter of a circle related to its radius?

• Diameter is the radius divided by two

• Diameter is twice the radius

• Diameter is the radius squared

• Diameter is half the radius

If a round table has a diameter of 100 cm, what is its radius?

• 25 cm

• 200 cm

• 50 cm

• 100 cm

What constant value is used to calculate the circumference of a circle?

• Euler's number (e)

• The golden ratio (φ)

• Pi (π)

• The square root of 2 (√2)

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

• Circumference is π times the diameter

• Circumference is twice the diameter

• Circumference is half of the diameter

• Circumference is equal to the diameter

How can the circumference of a circle be calculated?

• π times radius

• 2π times radius

• π divided by diameter

• π times diameter

What shape is formed when a circle is divided into 36 equal parts and rearranged?

• Square

• Triangle

• Hexagon

• Rectangle

What formula is used to calculate the area of a circle?

• πd

• πr²

• 2πr

• πr

If the radius of a circle is 14 cm, what is its area?

• 308 cm²

• 616 cm²

• 196 cm²

• 882 cm²