Question

Chapter Mensuration ,pls solve this​

Answer 1

Answer:

1]radius=10cms

2]area of figure=410cm sq.

Step-by-step explanation:

Answer 2

Step-by-step explanation:

area and perimeter of the semi circle

area=3.14×7^2/2 cm^2

=49×1.57 cm^2

=76.93 cm^2

perimeter=3.14×7 cm+2×7 cm=21.98 cm+14 cm

=35.98 cm

PQ=16 cm

QR=12 cm

so, PR=√(16^2+12^2) cm

=√(256+144) cm

=√400 cm

=20 cm

area of the triangle=1/2.16.12 sq cm

=8.12 sq cm

=96 sq cm

radius of the semi circle =20/2 cm=10 cm

area of the semi circle=3.14×10^2/2sq cm

=1.57×100 sq cm

=157 sq cm

area of the figure

(96+157) sq cm

=253 sq cm

=