Circles & Geometry

What does area mean?

• the distance around a shape

• the amount of space outside a shape

• half the distance around a shape

• the amount of space inside a shape

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's area?

• 31.25 m²
• 29.55 m²
• 30.36 m²
• 28.26 m²

Name the line show.

• Secant

• Diameter

• Radius

• Chord

What is the formula for CIRCUMFERENCE of a circle?

• C=πd

• C=πd²

• A=πr²

• C=πβγΔ

What is the formula for area of a circle?

• C=πd
• C=πd²
• A=πr²
• A= C/d

What is the area of the circle?

• 15.7 cm²
• 78.5 cm²
• 31.4 cm²
• 5 cm²

What is the circumference of the circle?

• 25.12 in.
• 12.56 in.
• 50.24 in.

What is the radius of this circle?

• 18
• 36
• 9
• 8

Write the equation of the circle.

• (x+1)² + (y +1)² = 3
• (x+1)² + (y -1)² = 3
• (x+1)² + (y +1)² = 9
• (x-1)² + (y -1)² = 9

What is the radius of the circle with this equation of  (x-5)²+(y+7)²=8?

• 4
• 8
• 4√2
• 2√2