Question

4c.m The diameter is com from a
round piece of wood. The radius
cricle is cut. Remove the ink from
the rest of the piece rorum​

Answer 1

Area of shaded region = Area of square ABCD − Area of 4 quadrants − Area of circle with diameter 2 cm

Area of square =4×4=16cm

2

Area of sector =

360

θ

×π×r

2

Area of 4 quadrants =4×

360

90

×π×1×1

=3.14cm

2

Area of circle=π×r

2

=π×1×1

=3.14cm

2

∴ Area of shaded region =16−6.28 =9.72cm

2