Image of a right triangle with a leg labeled 18 and hypotenuse labeled 75; the other leg is unknown and marked with a question mark.
65.4
70.5
72.8
93.0

Question

stromc3681 · Answer

does anyone know what this is I could use a lot of help?

mxddi3 · Answer

Welcome to QuestionCove!!

To solve this, we are going to use the Pythagorean Theorem:$$a^2+b^2=c^2$$

We are given that one leg is 18, and the hypotenuse is 75.

so we would write this put as: 
$$18^2+b^2=75^2$$

now, we are going to square our numbers.
 so 18^2 is 324
75^2 is 5625.

now, we have 
$$324+b^2=5625$$

the next step is going to be to get the b^2 on a side by itself. To do so, we are going to subtract 324 from both sides. 
$$324+b^2-324=5625-324$$

this will leave us with 
$$b^2=5301$$

now,can you find the square root of 5301 ?