Isosceles trapezoid

Find the area of an isosceles trapezoid, if the bases are 12 cm and 20 cm, the length of the arm is 16 cm

Correct result:

S =  263.8788 cm2

Solution:

a=12 cm c=20 cm r=16 cm  x=(ca)/2=(2012)/2=4 cm  h=x2+r2=42+162=4 17 cm16.4924 cm  S=a+c2 h=12+202 16.4924=64 17=263.8788 cm2



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