Question

(The photo is too big to fit so don't mind that.)

Answer 1

Answer:

82

Step-by-step explanation:

1'st step: $a^{2}$ + $b^{2}$= $c^{2}$ is the formula for the pythagorean theorem

2'nd step : $18^{2}$ + $80^{2}$ =  $c^{2}$

3'rd step:   324+6400 =  $c^{2}$

4'rd step: 6724=  $c^{2}$

5'th step: $\sqrt{6724}$ =82

6'th step : therefore the value of c is 82 cm