Question

Find the missing side lenght of the triangle below

Answer 1

12

Explanation:

Use Pythagorean theorem

`a^2 +b^2 =c^2`

c= always hypotenuse/ longest side/ side across from right angle = 13

a= 5

`5^2+b^2=13^2`

`25+b^2=169`

Subtract 25 from 169

`b^2= 144`

Square root both sides

b= 12

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it's also a special triangle known as a 5, 12, 13 triangle

Answer 2

12

Explanation:

5^2 + x^2 = 13^2

x = 12