## Cemantha 3 years ago Sarla made a drawing of a geometric figure for a fabric print. The figure was a quadrilateral with a pair of angles measuring 60° each. If the figure she drew is a concave polygon, which of these could be the measures of the other two angles? 30°, 210° 100°, 140° 160°, 80° 20°, 240°

1. dpaInc

do you know what concave means?

2. Cemantha

yes a polygon that has at least one vertex pointing toward the center; the measure of the angle created by that vertex will be greater than 180 degrees

3. dpaInc

yep...

4. dpaInc

so the remaining angles have total to what?

5. Cemantha

360

6. dpaInc

since two angles are 60 the remaining two have to total to what?

7. Cemantha

180

8. Cemantha

nooo WAIt

9. Cemantha

240

10. dpaInc

no.. the sum of the interior angles in a quadrilateral is 360...

11. dpaInc

yes... 240

12. Cemantha

whoot whoot im smart lol

13. Cemantha

thanks you .

14. Cemantha

your fixing my brain=) & i think its the 2nd one

15. Cemantha

100 & 140

16. dpaInc

can you draw a 4 sided figure thats concave and have those angles?

17. Cemantha

ummmmm..... no? i thnk

18. dpaInc

i don't think so either... so it's not that one...

19. Cemantha

so its the first one 30 & 210

20. Cemantha

si its the third one .

21. Cemantha

ok thnk you very much . i have to go ill ba back wen i get back . thanks super yu were much help

22. dpaInc

Sorry @Cemantha, you're answer of 30 & 210 is correct... I was thinking that one of the other angles was already the vertex that concave... see? remember what you're mom said? trust yourself... :)

23. Cemantha

thank you very much . you were much help and luckily i didnt put in the test yet i js left it there while i went to the store.