Question

Look at triangle ABC. What is the length of side AB of the triangle? Image down below :)

Answer 1

The answer is the third option.

Answer 2

Answer:

$\sqrt{18}$

Step-by-step explanation:

you need to use Pythagoras theorem

$a^{2}$+$b^{2}$=$c^{2}$

c is the hypotenuse. the longest side (ab)

a and b are the other two side lengths squared (bc,ca)

the length of both a and b are 3 squares long

$3^{2}$ is 9

you add the square of both sides together to get 18 this is $c^{2}$

you need to square root that to get the answer

$\sqrt{18}$