Ya Gcse

Question 1

Final amount

Answer 1

Final amount= (starting amount) x (multiplier)^n

Question 2

M d v

Answer 2

M

D x v

Question 3

If t and x directly proportional

Answer 3

Y= kx

Question 4

If y and x are inversely proportional

Answer 4

Y= k/x

Question 5

Corresponding angles

Answer 5

Equal

Question 6

Alternate angles

Answer 6

Equal

Question 7

Vertically opposite angles

Answer 7

Equal

Question 8

Exterior angle is regular polygon

Answer 8

360/n

Question 9

Area of parallelogram

Answer 9

bh

Question 10

Area of trapezium

Answer 10

1/2(a+b)h

Question 11

Volume of cylinder

Answer 11

πr^2h

Question 12

Surface area of cylinder

Answer 12

2 πr^2 + 2 πrh

Question 13

Area of sector

Answer 13

X/360 x πr^2

Question 14

Arc length

Answer 14

X/360 x2 πr

Question 15

Curved surface area of a cone

Answer 15

πrl

Question 16

Total surface area of cone

Answer 16

πrl + πr^2

Question 17

Surface area of a sphere

Answer 17

4 πr^2

Question 18

Scale factor

Answer 18

Enlarged length / original length

Question 19

Sine rule

Answer 19

a/ sin A = b/sin B = c/sin C

Question 20

Cosine rule

Answer 20

a^2= b^2 + c^2 -2bc x cosA

Question 21

Pythagoras in 3d shape

Answer 21

D^2 = a^2 + b^2 + c^2

Question 22

U

Answer 22

Means or

Question 23

n

Answer 23

Means and

Question 24

Histograms

Answer 24

Area of bar= frequency
Frequency density= frequency/class width