Question

Find "X"

Answer 1

and x in between 105 and 154, sorry

Answer 2

What do you know about the sum of all the interior angles of a pentagon?

Answer 3

Ummmmm (n-2)180

Answer 4

Right, and n is 5 here because there are 5 sides

Answer 5

Yes. So do I just plug in 5?

Answer 6

and what after that?

Answer 7

That's the next step, but not the answer! The sum of all the angles will be

180 * (n-2), n=5

180 * (5 - 2)

180 * 3

540

Answer 8

Then you just use algebra to determine what x must be. All the interior angles must add up to 540 so...

Answer 9

So, I solve for x?

Answer 10

Yeah, but you have to have an equation

Answer 11

So.. like, 88+154+105+x+21+x=540 ???

Answer 12

Exactly, except you wrote x twice

Answer 13

88+154+105+x+21=540

Answer 14

Oh, okay I think I got it now.

Answer 15

Great!