Equations N Dah

Question 1

Gradient

Answer 1

Change in y / change in x

Question 2

Gradient 2

Answer 2

Y2 - y1 / x2 - x1

Question 3

Gradient 3

Answer 3

Rise / run

Question 4

Acceleration

Answer 4

Change in velocity / time

Question 5

Midpoint of a line

Answer 5

(x1+x2 , y1+y2)

2 2

Question 6

Length of a line

Answer 6

Route (change in x)^2 + (change in y)^2

Question 7

Normal gradient vs perpendicular gradient

Answer 7

m

-1/m

Question 8

Bearings 3 stepz

Answer 8

Measure from north
Clockwise
3 figures eg 090^

Question 9

Completing the square

Answer 9

(x+b/2)^2 - (b/2)^2 +c

Question 10

A n b

Answer 10

Intersection of two circles

Question 11

A u b

Answer 11

All of circles

Question 12

Max bound

Answer 12

Max / min

Question 13

Min bound

Answer 13

Min / max

Question 14

Area and perimeter of sector of cicle

Answer 14

Q/360 x pi x r ^2

Q/360 x 2 x pi x r + r +r

Question 15

Area of parallelogram

Answer 15

B x h

Question 16

Area of trapezium

Answer 16

1/2 (a + b) x h

Question 17

Area of triangle

Answer 17

1/2 x (bxh)

Question 18

Volume of cube

Answer 18

Lhw

Question 19

Volume of cylinder

Answer 19

Pi x r^2 x h

Question 20

Volume of sphere

Answer 20

4/3 x pi x r^3

Question 21

Surface area of cylinder

Answer 21

2 x pi x r^2 + 2 x pi x r x h

Question 22

Volume of square based pyramid

Answer 22

1/3 x area of b x h

Question 23

SA and V of cone

Answer 23

Pi x r x l + pi r^2

1/3 x pi x r^2 x h

Question 24

P(a’ n b’)

Answer 24

Everything but the two circles

Question 25

P(A’ U B)

Answer 25

Intersection, B and outside

Question 26

P(A n B’)

Answer 26

Only A not intersection