Area
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What is the equation to find the area of a circle ?
πr2
What are the 2 equations for the circumference of a circle?
2 x π x r
π x d
Another word for a pizza slice in circle language
sector
Find angle AB^C
REFER TO FIGURE D
128o
Find angle ECA
REFER TO FIGURE K
35o
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What is the equation of the area of a sector ?
θ/360 x πr2
find the radius of a circle with circumference 170cm.
Give your answer in metres
0.27m
Find the value of BCD.
REFER TO FIGURE H
114o
Find angles f, g ,h
REFER TO FIGURE F
f = 86o
g = 94o
h = 86o
The diameter of a semicircular shape is 14 cm. What will be the perimeter of this shape? Give your answer correct to the nearest thousandth
167.938 cm
what is the radius of a circle with area of 152cm2 ?
Give your answer in metres
7cm
0.07m
Draw a diagram of a circle with a radius of 8 units and a sector formed by a central angle of 30o. Find the arc length and area of the sector. Round to the nearest tenth.
Length of arc = 4.2 units
Area of sector = 16.8 units2
What is the longest possible chord in a circle called ?
Diameter
Find angle marked x
REFER TO FIGURE J
107o
choose a team to answer this question. If they get it wrong, you get the points. If they get it right, they gain the points and your team will loose half the points.
A graphic designer creates a design for a company logo. The design is a green semicircle with a white quadrant, as shown. Find the area of the green part of the design. Use 3.14 as an approximation for π.
REFER TO FIGURE B
39,485.5mm2
choose a team to answer this question. If they get it wrong, you get the points. If they get it right, they gain the points and your team will loose half the points.
A jewelry designer is making a pendant. The pendant will be a circular disc (center O) with a circular hole cut out of it, as shown. The radius of the disc is 35mm. Find the area of the pendant.
REFER TO FIGURE A
2887.5mm2
P is the midpoint of AB.
Q is the midpoint of AC.
APQ is a sector of a circle, centre A.
Calculate the area of the white region.
REFER TO FIGURE G
3.14 cm
not a full circle, piece of the path
outside the circle, touching at point P
arc
Tangent
Find angle OCQ
REFER TO FIGURE I
OCQ = 144o
Jane is lining her yard with fences and she needs to know the perimeter of her yard. The hard consists of a 36m-sided square and 3 semi-circles. What is the perimeter of her yard ?
Round your answer to the nearest hundredth
REFER TO FIGURE C
205.65m
Calculate the shaded area, knowing that the sides of the square ara 6 cm.
Round your answer to the nearest unit.
REFER TO FIGURE L
8cm2
In a circular park with a radius of 250 m there are 7 lamps whose bases are circles with a radius of 1 m. The entire area of the park has grass with the exception of the bases for the lamps. Calculate the lawn area.
Round your answer to the third significant figure.
REFER TO FIGURE M
196000m2
inbetween a chord and an arc
segment
choose a team to answer this question. If they get it wrong, you get the points. If they get it right, they gain the points and your team will loose half the points.
A circular fountain of 5 m radius lies alone in the center of a circular park of 700 m radius. Calculate the total walking area available to pedestrians visiting the park. Round your answer to 2 significant figures.
15,000,000m2
The tire of a car has a radius of 10.5 inches. How many revolutions does the tire need to make for the car to travel 13,200 inches?
REFER TO FIGURE E
200 revolutions