Question

Find the value of x.

Answer 1

We need to find the scale factor for this which will give us how much the triangle was scaled down.
We can find this out by doing 8/12 which is simplified to 2/3.

We can check this is correct because 12 x 2/3 gives us 8.
So now we do 15 x 2/3 = 10

This means x - 4 = 10
x = 14

Answer 2

calculate the formula of the triangle and then use pythagoras thereom to solve the values according to their sides

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