Maths revision cards

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  • Created by: Mya Lane
  • Created on: 28-10-20 20:44
sum of interior angles of a polygon=
180x(n-2)
1 of 19
sum of exterior angles of a polygon=
360/n
2 of 19
Area of a circle=
pie x r squared
3 of 19
Circumference=
pie x diameter
4 of 19
length of arc=
theta/360 x 2 pie radius
5 of 19
Area of sector=
theta/360 x pie radius squared
6 of 19
Volume of a sphere=
4/3 x pie radius cubed
7 of 19
Surface area=
4 x pie radius squared
8 of 19
Volume of cylinder=
Pie x radius squared x height
9 of 19
Surface area of cylinder=
2 pie radius squared + 2 pie radius height
10 of 19
Make w the subject:
f=w+7m
p=2w+r
r=2+5w
w=f-7m
w=p-r/2
w=r-2/5
11 of 19
Volume of a cone=
1/3 pie radius squared x height
12 of 19
5.4 has been truncated to 1 d.p what are the
values it could have been?
5.4
13 of 19
if g(x)=5x-9
solve g(x)=21
5x-9=21
5x=30
x=6
14 of 19
given that f(x)=x squared
and g(x)=2x+5

a) find fg(x)
b) hence find fg(4)
fg(x)=(2x+5) squared
=4x squared +20x+25
=4x squared +20x+25

fg(4)=4(4)squared +20(4)+25
=64+80+25
=169
15 of 19
Given that a:b=8:5 and b:c=3:4,
find the ratio a:b:c
a:b:c
8:5_
__3:4
__24:15:20
16 of 19
x/y=4/5
x= 4y/5
17 of 19
x/y= 4/7
x= 4y/7
18 of 19
in a bag, the ratio of red to blue counters is 3:4
If 3 red counters are removed the ratio of red to
blue counters becomes 3:5. How many blue
counters are there in the bag?
r:b
3:4
3:8
6:12
9:16
12:20

blue=20
19 of 19

Other cards in this set

Card 2

Front

sum of exterior angles of a polygon=

Back

360/n

Card 3

Front

Area of a circle=

Back

Preview of the front of card 3

Card 4

Front

Circumference=

Back

Preview of the front of card 4

Card 5

Front

length of arc=

Back

Preview of the front of card 5
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