Isosceles trapezoid

Calculate the circumference and the area of the isosceles trapezoid if you know the size of the bases is 8 and 12 cm, and the size of the arms is 5 cm.

Correct answer:

o =  30 cm
S =  45.8258 cm2

Step-by-step explanation:

o=8+12+2 5=30 cm
S=52(4/2)2 (8+12)/2=10 21=45.8258 cm2

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