Question

A= 12.8m B=13.9m C=12m D= 7m

Answer 1

Answer:

C: 12m

Step-by-step explanation:

We can solve this by using the Pythagorean Theorem $a^{2} + b^{2} = c^{2}$

For this triangle

a= x   b= 5   c= 13

We now have the equation

$x^{2} + 5^{2} =13^{2}$

If we simplify this we get

$x^{2} + 25 = 169$

Next, we subtract 25 from both sides

$x^{2} = 144$

Finally, if we take the square root of both sides of the equation, we find that

x= 12