Equations Flashcards
1
Q
Area of Sector?
A
theta divided by 360 x pi r squared
2
Q
Quadratic formula?
A
X = - B +or- square route of b squared - 4ac all over 2a
3
Q
Speed?
A
Distance over time
4
Q
Density?
A
Mass over velocity
5
Q
Area of trapezium?
A
Half (a+b) x height
6
Q
Sum of exterior angles?
A
360 over number of sides
7
Q
Area of parallelogram?
A
base x height
8
Q
Volume of cylinder?
A
Pi x r squared x height
9
Q
Percentage change?
A
Change in price over original price x 100
10
Q
Interior angle?
A
180 - exterior angle
11
Q
Area of triangle?
A
Half x base x height
or
Half ab Sin C
12
Q
Pythagoras theorem?
A
A squared + B squared = C squared
13
Q
Cosine rule?
A
a squared = b squared + c squared - 2bc Cos A
14
Q
Sine rule when finding side?
A
a over Sin A = b over Sin B = c over Sin C
15
Q
Sine rule when finding angle?
A
Sin A over a = Sin B over b = Sin c over c
