6.MG.1 Area, Circumference, & Circles

A circular swimming pool is 21 feet in diameter.

How many feet around is the pool?

• 10.5 ft

• 42 ft

• 65.94 ft

• 131.95 ft

If the word problem is asking you to find the space inside the circle, which formula should you use?

• r = d/2
• d = 2r
• C = πd
• A = πr²

If the problem ask you to find the distance around a circle, which formula should you use?

• r = d/2
• d = 2r
• C = πd
• A = πr²

Name the circle part shown

• Diameter

• Radius

• Chord

• Tangent

Name the circle part shown in red

• Diameter

• Radius

• Sector

• Tangent

Name the circle part shown

• Diameter

• Radius

• Chord

• Segment

The distance around a circle (circumference) is about ____ times the distance across the circle (diameter).

• 2 times

• 3 times

• 4 times

• 5 times

Which formula below would you use to find π?

• C/d = π
• C x d= π

π is equal to circumference divided by _________________.

• radius
• diameter
• area
• itself

What is the area of this circle?

• 82.13
• 78.5
• 314.16
• 170.12