FORMULAS
DEFINITIONS
CIRCLES
AREA
CIRCLE GRAPHS
100
WHAT IS THE FORMULA FOR RADIUS OF A CIRCLE?
r=d/2
100
WHAT DO WE CALL THE DISTANCE FROM THE CENTRE OF A CIRCLE TO ANY POINT ON THE CIRCLE?
RADIUS
100
WHAT IS THE SUM OF THE CENTRAL ANGLES OF ANY CIRCLE?
360 DEGREES
100
WHAT IS THE AREA OF A PARALLELOGRAM WITH BASE 7CM, AND HEIGHT 5.5 CM?
38.5 CM SQUARED
100
45 PEOPLE WERE ASKED THEIR FAVORITE DRINK. 17 CHOSE PEPSI, 19 CHOSE COKE, AND THE REST CHOSE OTHER. HOW MANY PEOPLE CHOSE OTHER?
9
200

WHAT IS A FORMULA FOR DIAMETER OF A CIRCLE?

d=2r

200
WHAT DO WE CALL THE DISTANCE AROUND A CIRCLE?
CIRCUMFERENCE
200

WHAT IS THE DIAMETER OF A CIRCLE WITH RADIUS 2.7CM?

5.4CM

200

WHAT IS THE AREA OF A TRIANGLE WITH BASE 6 MM AND HEIGHT 10 MM?

30 MM SQUARED

200
THERE ARE 355 STUDENTS IN A SCHOOL. 32% OF THEM SAY THAT MATH IS THEIR FAVORITE SUBJECT. HOW MANY STUDENTS PREFER MATH?
114
300
WHAT IS THE FORMULA FOR AREA OF A PARALLELOGRAM?
area= base x height
300
WHAT DO WE CALL THE DISTANCE ACROSS A CIRCLE, MEASURED THROUGH ITS CENTRE?
DIAMETER
300

WHAT IS THE CIRCUMFERENCE OF A CIRCLE WITH DIAMETER 9 MM?

28.26 MM

300

WHAT IS THE AREA OF A CIRCLE WITH RADIUS 3 CM?

28.26 CM SQUARED

300
WHEN ASKED THEIR FAVORITE COLOR, 52% OF STUDENTS CHOSE BLUE, 19% CHOSE YELLOW, 7% CHOSE GREEN, AND THE REST CHOSE RED? WHAT PERCENT OF STUDENTS CHOSE RED?
22%
400
WHAT IS THE FORMULA FOR AREA OF A TRIANGLE?
area = base x height, divided by 2
400
WHAT DO WE CALL A QUADRILATERAL WITH BOTH SIDES OF OPPOSITE SIDES PARALLEL?
PARALLELOGRAM
400

WHAT IS THE CIRCUMFERENCE OF A CIRCLE WITH A RADIUS OF 8 CM?

50.24 CM

400
THE AREA OF A RECTANGLE IS 24 CM. IF THE BASE IS 4 CM, WHAT IS THE HEIGHT?

6 CM

400

80 STUDENTS WERE ASKED THEIR FAVORITE SPORT. 35% OF STUDENTS CHOSE BASKETBALL, 40% CHOSE HOCKEY, AND 25% CHOSE VOLLEYBALL. HOW MANY STUDENTS CHOSE HOCKEY?

32

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