Circumference of Circles
Area of Circles
Polygon Area
Area of Composite Figures
Vocabulary
100
Find the circumference of the circle below. Answer in terms of pi AND when pi=3.14. 
6π cm
100
What is the formula to find the area of a circle?
A = π r2
100
Find the area of a rectangle.
Area = 60 in2
100
Draw an example of a composite shape. Include a triangle, rectangle, and semicircle
Drawing must include all 3 shapes
100
The radius of a circle is always ______ the diameter
Half
Diameter goes across the entire circle, the radius only goes across half
200
Find the circumference of a circle with a diameter of 7 miles.
Use 3.14 as pi.
21.98 miles
200
Find the area of a circle with a radius of 12cm.
Solve in terms of pi.
144π cm2
144 pi cm2
200
Find the area of a shape
A = 26 m2
200
A composite shape has an area of 500 ft2. The shape is composed of a circle and a triangle and the area of the triangle is 350 feet2. What is the area of the circle?
Area = 150 ft2
200
What is the formula for the area of a rectangle?
A = BH
Area equals base times height
300
Find the circumference of the circle below. Answer in terms of pi.
26π in
Circumference is pi times diameter
300
Find the area of a circle with a radius of 5 inches.
Use 3.14 as pi.
A = 78.5 inches2
300
What is the area of a triangle? The units are in meters
A = 60m2
300
Find the area of the composite figure. 
A = 216 cm2
Rectangle: 168 cm
Triangle: 96/2 = 48 cm
300
What are the two formulas for the circumference of a circle?
C = pi times diameter
and
C = 2 pi times radius
400
Find the circumference of a circle with a radius 2.5 yards.
Use 3.14 as pi.
15.7 yards
400
Find the area of a circle with a radius of 16 mm. Solve in terms of pi AND using pi as 3.14.
803.84 mm2
256 pi mm2
400
What is the area of a triangle with a height of 7 inches and a base of 14 inches?
A = 49 in2
Formula Area of a triangle = BH/2 <-- Base times Height divided by 2
400
Find the area of the composite figure.
A = 42 cm2
400
What are the diameters are the following circles?
Radius = 19.5 inches
Radius = 14.25 miles
Diameter = 39 inches
Diameter = 28.5 miles
If the radius is half the diameter, we just multiple it by 2 in order to find the diameter
500
Find the circumference of a circle with a diameter of 1.5 mm.
Use 3.14 as pi.
4.71 mm
500
Find the area of the semi-circle below with a radius of 3 cm.
Use 3.14 for pi.
Use area for a circle, then divide by 2 because it's a semicircle
A = 14.13 cm2
500
What is the area of a semicircle with the diameter of 15 meters? Round your answer to the nearest 100ths place (two decimal points)
Use 3.14 for pi
A = 176.63 m2
500
Find the area of the figure below.
Area = 521 mm2
Trapezoid: 364 mm
Semi-circle: 314/2 = 157 mm
500
If you found the circumference of a circle in terms of pi to be 28 pi cm, what would be the area?
Solve in terms of pi
A = 196 pi cm2
If the circumference is 28 pi, then the diameter is 28 cm. Which makes the radius 14 cm.