Question

Look at the two polygons below.



Which polygon is concave?

Polygon 2

Neither Polygon 1 nor Polygon 2
Both Polygon 1 and Polygon 2

Polygon 1

Answer 1

what do u think

Answer 2

i don't know honestly.

Answer 3

therez a easy way to test if a polygon is concave

Answer 4

to remember what concave means think of something caving in. based on that, which polygon looks caved in?

Answer 5

if you could draw a segement whose endpoints lie within in the polygon, but the segment goes outside of polugon, then its a concave polygon.

Answer 6

Is it polygon 2 then?

Answer 7

yes

Answer 8

yes and no. polygon1 is concave too

Answer 9

oh crap, realleh

Answer 10

:)

Answer 11

oh right, i remember my teacher told me that all irregular polygons are concave...

Answer 12

?
How are all irregular polygons concave?

Answer 13

not all irregular polygons are concave

Answer 14

I hope his teacher didn't really say that then!

Answer 15

yea thats the problem