Question

Please help and explain!

Answer 1

8<x<12

Explanation:

We know that sum of any two side of triangle is greater then 3th side, so we have:

x+8>4

x+4>8

4+8>x

i.e

x>-4

x>4

12>x

We can conclude that 4<x<12.

From the picture x is the biggest, x must be greater than 8.

So we have 8<x<12