Use the pythagorean theorem method: a^2 + b^2 = c^2
(sqrt stands for Square Root)
1. 5^2 + 12^2 = 169
sqrt(169) = 13
The length of the missing side is 13cm.
2. Since we don't have the length of side B we'll have to do this ourselves. We'll start with 16.
9^2 + 16^2 = 337
sqrt(337) = 18.3
It isn't 16 cuz we need it to equal 15. Let's try a lower number. This time we'll try 12.
9^2 + 12^2 = 225
sqrt(225) = 15
So, the length of the missing side is 12cm.
3. 8^2 + 6^2 = 100
sqrt(100) = 10
The length of the missing side is 10km.
