Question

A pentagon with one interior angle that measures 200 degrees is a ___________ polygon.

A.concave
B.convex
C.regular
D.none of the above

Answer 1

I believe we use the formula:

\(180(x - 2)\)

Where 'x' is the number of sides..

Answer 2

This is to find the sum of the interior angles of a polygon..then we can divide by the number of sides to get the measure of 1 angle.

Answer 3

that is for regular pentagon only

Answer 4

Oh

Answer 5

but we do use that formula and find the interior angle of a regular pentagon

Answer 6

if that interior angle is > 200, then our pentagon is concave
if that interior angle is = 200, then our pentagon is regular
if that interior angle is < 200, then our pentagon is convex

Answer 7

so it would be concave?

Answer 8

or regular im kinda confused

Answer 9

It says it measures 200 degrees.

Answer 10

Concave is if the angle measures more than 200 degrees, convex is if the angle measures less than 200 degrees..

Answer 11

what is the interior angle of a regular pentagon?

Answer 12

lets not get into all that
and directly use this :


Concave or Convex

A convex pentagon has no angles pointing inwards. More precisely, no internal angles can be more than 180°.

When any internal angle is greater than 180° it is concave. (Think: concave has a "cave" in it)

Answer 13

source :
http://www.mathsisfun.com/geometry/pentagon.html

Answer 14

ill check out the source thank you