## nagdy1 Group Title 1. What is the sum of the interior angle measures of a 20-gon? (1 point) 360o 3,240o 3,600o 162o one year ago one year ago

1. nagdy1

2. What is the measure of one interior angle of a regular 12-gon? (1 point) 30o 180o 1,800o 150o 3. What is the value of x in the regular polygon below? (1 point) 40 120 60 150 4. What is the measure of an exterior angle of a regular octagon? (1 point) 360o 135o 60o 45o 5. If the measure of an exterior angle of a regular polygon is 24, how many sides does the polygon have? (1 point) 24 12 15 18

2. nagdy1

for number 3 the picture is this

Do you know the formula to find the sum of the interior angles of a regular polygon?

4. sparik1997

((n-2)*180)/n

5. sparik1997

so in the case of 20-gon it'll be..

To find the sum: 180(n-2) To find 1 angle it is: 180(n-2)/n

@nagdy1, what will the sum of a 20-gon's angles, given that the sum is 180(n-2)?

8. nagdy1

1800

No, try again. (Hint:180x(20 - 2))

10. nagdy1

3240

11. iloveyou1212

Cheating on a test is necessary. Hi Jeff :D

12. jefftheloveableguy

alright the formula is (n-2)180 for the total measure so n is 20 and 3240 is what you get after plugging it in

13. nagdy1

this is a quick check not a test

14. nagdy1

15. nagdy1

for number 2 it is 1800 right

16. nagdy1

i need help 3,4,5

17. nagdy1

ill give medal and fan

18. nagdy1

hey @blondie16

19. nagdy1

How many sides does number 3 have?

21. nagdy1

6 sides of course

To find the measure of one angle it is: 180(n-2)/n (n=number of sides)

What is the measure of one angle of a hexagon?

24. nagdy1

so its 120

So this means: 3x = 120

26. nagdy1

cool medal to u

27. nagdy1

40

Number 4: To find the measure of one exterior angle is: 360/n (The sum of the exterior angles is ALWAYS 360)

29. nagdy1

so its 45

Yes!

31. nagdy1

last questions

32. nagdy1

only one more to go

Number 5: Just apply the formula I gave you with some algebra: |dw:1356650509006:dw|

what grade unit and lesson are you on

35. nagdy1

Lesson 1: The Polygon-Angle Sum Theorems Geometry A Unit 6: Polygons and Quadrilaterals

36. nagdy1

1. What is the sum of the interior angle measures of a 20-gon? (1 point) (0 pts) 360o (1 pt) 3,240o (0 pts) 3,600o (0 pts) 162o 1 /1 point 2. What is the measure of one interior angle of a regular 12-gon? (1 point) (0 pts) 30o (0 pts) 180o (0 pts) 1,800o (1 pt) 150o 0 /1 point 3. What is the value of x in the regular polygon below? (1 point) (1 pt) 40 (0 pts) 120 (0 pts) 60 (0 pts) 150 1 /1 point 4. What is the measure of an exterior angle of a regular octagon? (1 point) (0 pts) 360o (0 pts) 135o (0 pts) 60o (1 pt) 45o 1 /1 point 5. If the measure of an exterior angle of a regular polygon is 24, how many sides does the polygon have? (1 point) (0 pts) 24 (0 pts) 12 (1 pt) 15 (0 pts) 18 1 /1 point