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Flashcards in Equations Deck (19)
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1

Area of Sector?

theta divided by 360 x pi r squared

2

Quadratic formula?

X = - B +or- square route of b squared - 4ac all over 2a

3

Speed?

Distance over time

4

Density?

Mass over velocity

5

Area of trapezium?

Half (a+b) x height

6

Sum of exterior angles?

360 over number of sides

7

Area of parallelogram?

base x height

8

Volume of cylinder?

Pi x r squared x height

9

Percentage change?

Change in price over original price x 100

10

Interior angle?

180 - exterior angle

11

Area of triangle?

Half x base x height
or
Half ab Sin C

12

Pythagoras theorem?

A squared + B squared = C squared

13

Cosine rule?

a squared = b squared + c squared - 2bc Cos A

14

Sine rule when finding side?

a over Sin A = b over Sin B = c over Sin C

15

Sine rule when finding angle?

Sin A over a = Sin B over b = Sin c over c

16

Area of circle?

Pi x r squared

17

Circumference?

Pi x diameter

18

Pressure?

Force over area

19

Length of arc?

theta over 360 x pi x diameter