Question

Hey guys, I need to know how do I solve this question? How do I find the value of x in question 15.? I'll five brainlest!

Answer 1

Answer:

Step-by-step explanation:

This is a very nasty question. It depends on how you interpret that 2x. The line looks like it is a straight line. But it is marked as an angle. I'm not sure which you believe -- the drawing or the way it is labeled. Because it is labeled the angle 2x is the vertex of two lines, so when you are counting the number of sides, 2x counts as 2 sides .

There are 8 sides

So the sum of the angles is (n - 2)*180 = 6 * 180 = 1080

Solution

x + 143 + 2x + 152 + 116 + 125 + 140 + 139 = 1080     Combine like terms

3x + 815 = 1080

3x = 265

x = 265/3

x = 88.33

If 2x is not an angle and is just the figment of someone's imagination, then the answer is

x + 815 = 900

x = 85

Which answer is correct? You are going to have to try them both. I would use 88.33 but don't be surprised if it is incorrect, and the answer is 85.