MATH

Question 1

Radius Circumference

Answer 1

2 PI X R

Question 2

Diameter Circumference

Answer 2

Pi X D

Question 3

Radius Area

Answer 3

Pi X R squared

Question 4

Diameter Area

Answer 4

1/2 D then Pi X R squared

Question 5

AREA of 1/2 and 1/4

Answer 5

Find, R …. Pi x R squared / 2 = Area of 1/2

Find, R …. Pi x R squared / 4 = Area of 1/4

Question 6

Perimeter of 1/2 and 1/4

Answer 6

Half of circumference plus diameter

2Pi x R over 4 + R + R

Question 7

Square

Answer 7

L x W

Question 8

Rectangle

Answer 8

L x W

Question 9

Parallelogram

Answer 9

B x H

Question 10

Triangle

Answer 10

B x H divided by 2

Question 11

Trapezium

Answer 11

A + B / 2 x H

Question 12

Kite

Answer 12

X x Y / 2

Question 13

Rhombus

Answer 13

P x Q / 2

Question 14

Converting areas

Answer 14

x 1000^, 100^, 10^ = from big to small

/ 1000^, 100^, 10^ = from small to big

Question 15

Working backwards from Circumference: D, R and A

Answer 15

Diameter C = Pi x D D = Pi x D.
/ pi /pi
Radius C = 2 x Pi x R D = 2 x Pi x R
/pi. /pi

Question 16

Terminating decimals

Answer 16

Has an end digit

Question 17

Recurring decimals

Answer 17

Repeat infinitely

Question 18

Irrational

Answer 18

Can’t be expressed in ratio

Question 19

Rational

Answer 19

Can be in ratio or fraction