Question

calculate the length of the boundary and the area of the shaded region in the following diagrams.all measurements are in centimetres​

Answer 1

length of boundary=10+7+10+(2×22/7×7/2

=27+22

=49cm

area=10×7-(22/7×7/2×7/2)

=70-77/2

=140-77

2

=63/2

=31.5cm^2

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