Question

Find the value of x that makes A ABC ~ A DEF.
B
E
12
18
A 8
C
30x 1
X =
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Answer 1

Find the scale:

12/4 = 3

The larger triangle is 3 times the size of the smaller one.

18/3 = 6

This means x-1 = 6 solving for x, you get x = 7.

The answer is X = 7