Yr 8

Question 1

a³ × a⁴

Answer 1

a⁷

Question 2

(a³)⁴

Answer 2

a¹²

Question 3

a³ ÷ a⁴

Answer 3

a‐¹

Question 4

a⁰

Answer 4

1

Question 5

What is the equation for sum of interior angles

Answer 5

Let n = number of sides of shape

180(n-2)

Question 6

Equation for exterior angle?

Answer 6

180 - interior angle

Question 7

Sum of exterior angles?

Answer 7

360°

Question 8

How to work out number of sides from exterior angle?

Answer 8

360/exterior angle

Question 9

What is the first significant figure? (Sig fig)

Answer 9

The first non-zero digit

Question 10

Area of a triangle?

Answer 10

b = base
h= height

2

Question 11

Equation for area of a parallelogram

Answer 11

bh

Question 12

Equation for a trapezium?

Answer 12

a = shorter top side iykwim

2

Question 13

Equation for circumference of a circle?

Answer 13

C = πd

Question 14

Equation for diameter of a circle?

Answer 14

d = 2r

Question 15

Equation for area of a circle?

Answer 15

A = πr²

Question 16

Equation for a straight line?

Answer 16

y = mx + c

m = gradient
c = y intercept

Question 17

How to calculate gradient?

Answer 17

Change in x

Question 18

Which is the y axis

Answer 18

The up-down one

Question 19

Which is the x axis?

Answer 19

The left-right one

Question 20

Equation for (avg.) speed?

Answer 20

Distance/time

Question 21

Volume of a prism?

Answer 21

Area of cross-section × length

Question 22

Volume of a cylinder?

Answer 22

πr²h

Question 23

SA of a cylinder?

Answer 23

2(πr²) + ch
OR
2(πr²) + πdh
OR
2(πr²) + π2rh

Question 24

What is a multiplier

Answer 24

The number you multiply an original value by to get a new value

Question 25

What is a 20% increase as a multiplier?

Answer 25

1.2

Question 26

What is a 20% decrease as a multiplier?

Answer 26

0.8

Question 27

What is a 20% decrease as a multiplier?

Answer 27

0.8

Question 28

What is a 150% increase as a multiplier?

Answer 28

2.5

Question 29

What is a 150% increase as a multiplier?

Answer 29

2.5

Question 30

How to calculate original value?

Answer 30

New value ---------------- Multiplier

Question 31

Hoe to calculate percentage change

Answer 31

Actual change -------------------- Original value

Question 32

How do you describe a translation?

Answer 32

A translation by (x) (y) But it's one big bracket

Question 33

How to describe a reflection?

Answer 33

A reflection in the line..(line equation)

Question 34

How to describe an enlargement?

Answer 34

An enlargement about the point (x,y) with scale factor (...)

Question 35

Define congruent

Answer 35

Two shapes that are exactly the same shape and size

Question 36

Define similar shapes

Answer 36

Two shapes in same shape but sized proportionally

Question 37

How is scale factor calculated?

Answer 37

Ratio between 2 corresponding sides (12/8 = scale factor of 1.5)