2. Find the number of sides of a polygon if
the sum of the interior angles is
a) 10 right angles
b) 720°
d) 54

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°​

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”

  1. Answer:

    a) 7

    b) 6

    c) 5

    d) 11

    Step-by-step explanation:

    a) 10 right angles = 900 degree

    sum 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=7

    b)

    applying the same formula,

    (n-2)*180=720

    n-2=720/180=4

    n=6

    c)

    again (n-2)*180=540

    n-2=540/180=3

    n=5

    d)

    (n-2)*180=1620

    n-2=1620/180=9

    n=11

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

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