Isosceles trapezium ABCD ABC = 12 angle ABC = 40 ° b=6. Calculate the circumference and area.

Correct answer:

o =  26.8075
S =  28.5542

Step-by-step explanation:

a=12 b=6 B=40   x=b cosB=b cos40° =6 cos40° =6 0.766044=4.59627 c=a2 x=122 4.59632.8075  o=a+2 b+c=12+2 6+2.8075=26.8075
h=b sinB=b sin40° =6 sin40° =6 0.642788=3.85673 S=2a+c h=212+2.8075 3.8567=28.5542

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