Question

Please help! Find the missing

triangle.
Х
5
12
x
= [?]
Enter the number that belongs in the green box.
Enter

Answer 1

x = 13

Explanation:

Here, we want to get the missing side

from what we have, the triangle is a right angled triangle

In this kind of triangle, the Pythagoras’ theorem works

The square of the side facing the right angle ( marked x here) is equal to the sum of the squares of the two other sides

We have this as;

x^2 = 5^2 + 12^2

x^2 = 25 + 144

x^2 = 169

x = √169

x = 13