9.1 Circles and Circumference
What is the radius of a circle with a diameter of 16cm?
8cm
Find the area of a circle with a radius of 6ft. Use 3.14 for pi.
113.04 square feet
Slide 2
about 24 units
Slide 12
check answer
What is Taylor Swift's Top Song?
a. Shake It Off b. Teardrops on My Guitar
c. Willow d. Welcome to New York
A circle has a radius of 5in. Using 3.14 for pi, find the circumference.
31.4in
Find the area of a circle with diameter of 26in. Use 3.14 for pi.
530.66 square inches
Slide 4
16 Square Units
check answers
Check answer
A circular swimming pool has a diameter of 14ft. What is the circumference of the pool? Use 3.14 for pi.
43.96ft
Find the area of a semicircle with a diameter of 5yd. Use 3.14 for pi.
9.8125 square yards
Slide 6
Perimeter: 36.84 ft
Area: 64.26 square feet
Slide 16
supplementary 73
How many muscles are there in the human body? (Closest gets it)
about 640 muscels
A semicircle has a radius of 15in. What is the perimeter of the semicircle?
62.1in
The boundary of a wildlife refuge is located 6.2 miles away in all directions from the refuge headquarters. How many square miles are in the wildlife refuge?
about 121 square miles
Slide 8
27.8 gal of wood stain
Slide 18
24 degrees
What pick was Giannis drafted in the 2013 NBA draft?
15th
Th e wheels of a monster truck are 66 inches tall. Find the distance the monster truck travels when the tires make three 360-degree rotations.
621.72 in
A local event planner wants to cover a circular region with mud for an obstacle course. The region has a circumference of about 157 feet. Th e cost to cover 1 square foot with mud is $1.50. Approximate the cost to cover the region with mud.
about $2950
about 2.7 gal
Slide 20
x = 16
What comes after million, billion, and trillion?
Quadrillion