Question

What is a polygon called if the sum of its interior angles equals
1440? a dod. dec. or oct?

Answer 1

Divide 1440 by 180 to see how many triangles the polygon has.

Answer 2

How many did you get?

Answer 3

8

Answer 4

180(n-2) = 1440
180n - 360 = 1440
180n = 1800
n = 10

Therefore, it's dec

Answer 5

So the number of sides has to be 2 more than the number of triangles. So how many sides does it have?

Answer 6

petew said it alrdy

Answer 7

Recall the formula: Total angle in polygon = 180(n-2)

Answer 8

I saw that. He ruined it for you. Now we know that he can do the problem, but we are not so sure about you.

Answer 9

I've given the steps to do the problem, all you need to do is understand them.

Answer 10

no its fine i just really need to remember the definitions to this shapes the formula i wrote it down thx