1.

Find the area of the shades portion question no 11

Answer»

1) √ 12²+5²=√144+25=√169=13

from HERONS formula,

s=13+14+15/2=21

area=√21(21-13)(21-14)(21-15)

=√21*8*7*6

=√3*7*2*2*2*7*2*3

=2*3*7*2

=84

now area of shaded figure

=84-area of r.Δ

=84-1/2*12*5

=84-30

=54




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