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# find the sum of the interior angles of a nonagon

1. Find the sum of the interior angles of a nonagon. (1 point)

140°
1,620°
1,260°
1,450°

1. Find the measure of each interior angle of a polygon with 12 sides. (1 point)

1,800°
150°
180°
145°

1. Four of the angles of a pentagon measure 85°, 110°, 135°, and 95°. Find the measure of the missing angle. (1 point)

115°
95°
135°
85°

1. 1,260°
2. 150°
3. 115° 1 0 2,386
Feb 5, 2013
All are right. 1 0
👩‍🏫
Ms. Sue
Feb 5, 2013
2.
Find the sum of the interior angles of a nonagon. (1 point)

140°
1,620°
1,260°
1,450°

When you walk all the way around a figure with straight sides clockwise you turn 360 degrees. Ech of your right turns is 180 – interior angle there

in this case 9 * right turn angle = 360
right turn angle = 40
so each interior angle is 180 – 40 = 140
9* 140 = 1260

4.
Same deal for the next one
360/ 12 = 30
180 – 30 = 150 = interior angle

5.
each exterior angle = 180 – angle
180 – 85 = 95
180 – 110 = 70
180 – 135 = 45
180 – 45 = 85
then we have (180-x)
95+70+45+85 +180 – x = 360
475 – x = 360
x = 115

1 1
posted by Damon
Feb 5, 2013
Those answer are all correct, good job.

0 0
posted by Ms. Smart
Feb 10, 2017

1. B
2. C
3. A
4. B
5. A
6. C
7. D
8. C
9. B
10. D
11. C
12. You have to do that one yourself it’s a writen answer. 8 1
posted by Allison
Feb 3, 2019

Thank you Allison

0 0
posted by UnaLoca
Feb 4, 2019
Nice job Allison! Those answers are 100%

0 0
posted by MarineCat6
Feb 12, 2019