Circles
Parallelograms
Triangles
Circle Graphs
Formulas
100
What formula is used to find the area of a circle?
a = πr 2
100
What is the area of this parallelogram?
Base= 6m
Height = 11m
The area is 66m2.
100
A triangle has a base of 6ft and a height of 9ft. What is the area?
Area = 27 ft2
100
150 students were asked what their favourite sport was. 36% of the students said they liked dance best. How many students favourite sport is dance?
54 students like dance.
100
What is the formula for calculating the area of a circle?
200
What is the circumference of this circle?
25.12cm
200
What is the area of this parallelogram?
109.12cm2
200
If a triangle has an angle larger than 90o what kind of triangle is it?
It is an obtuse triangle.
200
If 100 students were asked what their favourite subject was and 25 students liked Math, 25 students liked Science, 25 students liked Art, and 25 students liked Gym. What would the circle graph look like?
The circle will be split into quarters.
200
Parallelograms and rectangles share what formula in common?
A=bh
300
What is the area of this circle?
1,384.74 in2
300
Paige says the area of this parallelogram is 18cm2. Is she right? Explain.
No Paige is wrong. She used 3cm as the height not 2.5cm. The correct area is 7.5cm2
300
The inside angles of a triangle should equal?
180o
300
350 people were asked if they were right or left handed. 76% said they were right handed. How many people are right handed?
266 people are right handed.
300
What is the formula for find the circumference of a circle?
C= 2π r
400
Jayden says the area of this circle is 376.8 cm2.
The correct area is 452.16 cm2.
400
What is the missing height?
9cm
400
Sara needs to pave a triangle that has a base of 11.6 ft and a height of 34.6 ft. The contractor told her it would cost her $125 per square foot. How much will Sara need to pay to pave the triangle?
Area = 200.68 ft2
200.68 x 125 = $25 085.00
400
A circle graph describes peoples favourite pizza toppings. What % of people like bacon?
Mushrooms = 7%
Ham and Pineapple = 13%
Cheese = 30%
Pepperoni = 27%
Bacon = ?
100%-7%-13%-30%-27%= 23%
23% of people like bacon.
400
What is the formula for finding the area of a triangle?
A= bh
2
500
The area of a circle is 76.4 ft2. What is the radius and diameter?
D= 24.33ft
R= 12.17ft
500
Which shape has a larger area?
Shape A: b=6.3in h= 4.8in
Shape B: b=7.1in h= 2.9in
Shape A is larger.
Shape A: 15.12 in2
Shape B: 10.29 in2
500
Give the 3 dimensions of a triangle that's area is 12in2.
2in x 12in
1in x 24in
3in x 8in
4in x 6in
500
75 people were asked their favourite season. Write each category as a fraction.
Summer: 27 People
Fall: 20 People
Winter: 9 People
Spring: 19 People
Summer: 27/75
Fall: 20/75
Winter: 9/75
Spring: 19/75
500
What formula do we use to find the area of a circle?
A=π r2