1
Q
for direct proportion, y =
A
y = kx
2
Q
for inverse proportion, y =
A
y = k / x
3
Q
what is the significance of co-interior angles ?
A
add to 180
4
Q
how to work out if regular polygons will tessellate ?
A
interior angle divides into 360
5
Q
exterior angle =
A
360 / number of sides
6
Q
what odes it mean if two shapes are congruent ?
A
same shape and size
7
Q
give the 4 ways of proving congruence
A
SSS
SAS
ASA
RHS
8
Q
what does it mean if two shapes are similar ?
A
identical in shape but differ in size
9
Q
sum of interior angles =
A
180(n-2)
10
Q
area of trapezium =
A
0.5(a + b) h
11
Q
Surface area of a sphere =
A
4πr^2
12
Q
Surface area of a cone =
A
πrl + πr^2
13
Q
surface area of a cylinder =
A
2πrh + 2πr^2
14
Q
volume of a sphere =
A
4/3 πr^3
15
Q
volume of a pyramid =
A
1/3 x base area x height
BMAT
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