MATHS LINK Flashcards
1
Q
(PERCENTAGES) How to find a percentage of a number
A
x% X amount
2
Q
(PERCENTAGES) How to find percentage increase/decrease
A
find the % of that amount then add/minus it on to the original
3
Q
(PERCENTAGES) How to find percentage change
A
(New - old / old) x 100
4
Q
(RATIO) Simple ratio
A
add the two values together (5:7 - add = 12)
divide amount by added value = x
multiply ratio shares by value x
5
Q
SURFACE AREA
A
adding all areas in the surface
6
Q
(AREA) triangle
A
(B x H) / 2
7
Q
(AREA) trapezium
A
(a + b / 2) x h
8
Q
(AREA) Circle
A
pi R squared
9
Q
(AREA) rectangle
A
width x length // b x h
10
Q
(VOLUME) cuboids
A
b x w x h
11
Q
(VOLUME) sphere
A
(4/3) pi R squared
12
Q
(VOLUME) prisms
A
area of cross section (triangle) x section x length
13
Q
(VOLUME) cylinders
A
(pi R squared) x h
