2. Find the number of sides of a polygon if

the sum of the interior angles is

a) 10 right angles

b) 720°

d) 540°

c) 1620°

# 2. Find the number of sides of a polygon if

### 1 thought on “2. Find the number of sides of a polygon if<br />the sum of the interior angles is<br />a) 10 right angles<br />b) 720°<br />d) 54”

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Answer:a) 7

b) 6

c) 5

d) 11

Step-by-step explanation:a)10 right angles = 900 degreesum of interior angles of a polygon =(n-2)*180

where n is the number of sides

900=(n-2)*180

n-2=900/180=5

n=7b)applying the same formula,

(n-2)*180=720

n-2=720/180=4

n=6c)again (n-2)*180=540

n-2=540/180=3

n=5d)(n-2)*180=1620

n-2=1620/180=9

n=11n is the number of sides in each case, hence the answer