Let me see if you didn't bunk your maths classes in your 10th grade
Geometry
Level
2
In the figure shown, a circle is enclosed in trapezium ABCD touching all of its 4 sides, where
AD = BC,
AB = 10,
CD = 16,
find BC.
The answer is 13.
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1 solution
(16/2)+(10/2)=13, because the sides of the cone shape are equal and are half of the side.