1.

A square, a regular pentagon and a regular hexagon are jointly drawn in the figure Find ∠BAC

Answer»

One angle of a regular pentagon = 108° 

One angle of a regular hexagon = 120°.

One angle of a square = 90°

∴ ∠BAC = 360 – (108 + 20 + 90)

360 – 318 = 42°.



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