Review Geo Lessons 1 - 4 Circles

Review EE Lessons 1 - 4 Circles

Circumference & Area

Formulas

"Cherry pie is delicious, Apple Pies are too"

Multiple Choice

What is the diameter of a circle?

• the distance around a circle

• the area of a circle

• a line from the center to a point on the circle

• a line through the center with end points on the circle

Multiple Choice

What does area mean?

• the distance around a shape

• half the distance around a shape

• the amount of space outside a shape

• the amount of square units inside a shape

Multiple Choice

What does circumference mean?

• the distance around a circle

• half the distance around a circle

• the amount of space outside a circle

• the amount of square units inside a circle

Multiple Choice

What is the diameter?

• 9 ft

• 18 ft

• 4.5 ft

• 81 ft

Multiple Choice

A circular swimming pool is 21 feet in diameter. What is the circumference of the pool rounded to the nearest hundredths ?

• 138.54 ft

• 32.99 ft

• 65.97 ft

• 131.95 ft

Multiple Choice

Line segment BD is which of the following?

• Diameter

• Chord

• Radius

• Circumference

Multiple Choice

Line segment EF is which of the following?

• Diameter

• Chord

• Radius

• Circumference

Multiple Choice

The circumference of the circle is 40.84 cm. What is the diameter?

• 20 cm

• 26 cm

• 13 cm

• 10 cm

Multiple Choice

Line segment AC is which of the following?

• Diameter

• Area

• Radius

• Circumference

Multiple Choice

The AREA of a circle is 201.06 cm². What is the radius?

• 8 cm

• 16 cm

• 100 cm

• 64 cm

Multiple Choice

The diameter of the face-off circle on an ice-hockey rink is 30 feet. Find its circumference to the nearest hundredths.

• 706.86 ft

• 2827.43 ft

• 47.12 ft

• 94.25 ft

Multiple Choice

Kai is making a cake. The RADIUS of the cake is 7 inches. What is the CIRCUMFERENCE of the cake in terms of   $\pi$ ?

•  $7\ \pi\$  in
  

•  $14\ \pi\$  in  

•  $49\ \pi\$  in

•  $3.5\ \pi$  in
  

Multiple Choice

What is the area of this circle in terms of  $\pi$  ?

•  $25π\ m^2$  
  

•  $10π\ m^2$  

•  $π\ m^2$  

•  $5π\ m^2$  

Multiple Choice

The AREA of a circular rug is 50.27  $ft^2$  . Which equation would be used to calculate the radius?

•  $50.27\ =\ \pi d$  

•  $\frac{50.27}{r^2}=\ A$  

•  $50.27\ =\ \pi r^2$  

•  $50.27r^2\ =\ \pi$  

Multiple Choice

The CIRCUMFERENCE of a circular garden is 53.41 cm. Which equation would be used to calculate the diameter?

•  $\frac{53.41}{d}=\ C$  

•  $53.41\ =\ \pi r^2$  

•  $53.41\ =\ \pi d$  

•  $53.41d\ =\ \pi$  

Multiple Choice

Calculate AREA of the following semi - circle to the nearest hundredths.

• 39.27 cm²

• 31.42 cm²

• 78.54 cm²

• 314.16 cm²

Multiple Choice

Find the circumference of the circle in terms of  $\pi$  .  

•  $36\pi\ in^{ }$ 

•  $6\pi\ in^{ }$ 

•  $12\pi\ in^{ }$ 

•  $36\ in^{ }$ 

Multiple Choice

Which formula would be used to calculate the perimeter of this semi-circle?

• $P\ =\ \frac{18\pi}{2}\ +\ 9$

• $P\ =\ \frac{18\pi}{2}$

• $P\ =\ \frac{18\pi}{2}\ +\ 2\$

• $P\ =\ \frac{18\pi}{2}\ +18$

Multiple Choice

What is the next step to solve for radius?

• Take the square root. Radius = 11 cm

• Divide by r. Radius = 12 cm

• Multiply by 2. Radius = 242 cm

• Divide by r² . Radius = 10 cm

Multiple Choice

Which of the following is the ratio for pi?

• $\frac{circumference}{diameter\ }$

• $\frac{radius}{diameter}$

• $\frac{diameter}{perimeter}$

• $\frac{diameter\ }{radius}$