Assessment 3 Review

Division

100

120/6

20

200

453/5

90.6

300

130.5 / 5

26.1

400

808.8 / 3

269.6

500

750.7 / 6

125.11666666666666666666

Diameter/Radius

100

The diameter is 66cm, so what is the radius?

33cm

200

The diameter is 75cm, so what is the radius?

32.4cm

300

The circumference is 172.2cm, so the diameter is...

55cm

400

The circumference is 282.6cm, so the radius is...

45cm

500

The circumference is 550cm, so the diameter is...

175.1592357cm

Area of a Circle

100

The formula for area of a circle

A= Pi x r x r

or

A= Pi x r²

200

The radius is 5, so the area is...

78.5cm²

300

The diameter is 55, so the area is...

2374.625cm²

400

The diameter is 2, so the area is...

3.14cm²

500

The radius of one circle is 6 and the diameter of another circle is 10. What is the area of both circles all together?

78.5cm² + 113.04cm² = 191.54cm²

Circumference

100

The formula for circumference of a circle is....

C=Pi x Diameter

or

C=Pi x Radius x 2

200

The diameter is 10cm, so the circumference is...

31.4cm

300

The radius is 14cm, so the circumference is...

87.92cm

400

The radius is 0.5cm, so the circumference is...

3.14cm

500

The radius of one circle is 5cm and the diameter of another circle is 5cm. What is the circumference of both circles all together?

47.1cm

Scale

100

If the scale is 1:4, which number means the size in real life?

the 4

200

A drawing of a puppy is 10cm long. The scale is 1:5. How long is the puppy in real life?

50cm

300

Lets pretend Mr. Graham is 110cm tall. If the scale of Mr. Graham's statue is 50:1, how tall is the statue?

5500cm because the statue is 50x bigger than Mr. Graham

400

A picture of a cat is 6cm, but in real life the cat is 66cm. What would the scale be?

1:11 because it is 11 times bigger in real life

500

On a big map, Eskilstuna is 127.94cm from Mr. White's home. If the scale is 1 : 5,000,000, how far is Mr. White from home?

639,700,000cm or 6397km