Question

only question number 10 solve ​

Answer 1

Answer:

area trapezium= 1/2*h*(b1+b2)

h= 8 cm

b1= 10 cm

b2=12cm

area= 1/2*8*(10+12)

=4*22=88 cm^2

area rectangle= l*b

l=12cm

b=10 cm

area=10*12 =120cm^2

now area of octagon = 2(area trapezium)+(area rectangle)

=2*(88)+(120)= 176+120= 296 cm^2