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Help me how do you do this plz no links

Help Me How Do You Do This Plz No Links class=

Sagot :

It is x=12 or the last option

Answer:

12

Step-by-step explanation:

According to the Pythagorean Theorem,

5^2 + X^2 = 13^2, OR

25 + X^2 = 169

X^2 = 169, SO X = √144, or 12

The unknown side has length 12.