Can someone help me out please?(:

Question

liv1234 · Answer

attachment

liv1234 · Answer

@amistre64

e.mccormick · Answer

Do you know your 45-45-90 rules, or do you just want too use the $a^2+b^2=c^2$ that works for any right triangle?

liv1234 · Answer

Whichever one is easier because I'm not good with trig at all

e.mccormick · Answer

You don't really need trig for this past knowing what rules apply.  Just some algebra.

You are given a 45 and a 90 as angles.  Know what that means for the 3rd angle?

liv1234 · Answer

We have to see what 45+?=90?

e.mccormick · Answer

yah.

liv1234 · Answer

And the answer would be 45.

e.mccormick · Answer

Yep.  Now, whan two angles are the same on a traingle, what does that mean for the sides opposite those angles?

liv1234 · Answer

They are going to be the same as well?

e.mccormick · Answer

Exactly!  So you really have this:

|dw:1427091345444:dw|

liv1234 · Answer

Oh, wait it means they are congruent right?

liv1234 · Answer

So, would the answer be 16 sqrt2? Or just 16?

e.mccormick · Answer

The same and congruent have the same meaning.  =)

Well, you have the formula:
$a^2+b^2=c^2$  but in this case a and b are the same, so I can write it as:

$2(a^2)=c^2$

So, which do you think?

liv1234 · Answer

B?

e.mccormick · Answer

Yah.  And I hope you see why.

liv1234 · Answer

I do, and thank you for your help(:

e.mccormick · Answer

Have fun!