1.

Please give the right answer of this question and solve it with herons formula ​

Answer»

Step-by-step explanation:

In ∆ABD, AB=√12²+5²=13

so , AB =13

Area ∆ABD =1/2 × 12×5=30 SQ units

Perimeter of ∆ABC=A+B+C=15+14+13=42

semi-perimeter=21

Area of ∆ABC =√S(S-A)(S-B)(S-C)

=√21×(21-15)×(21-14)×(21-13)

=√21×6×7×8

=√7056

=84 sq units

Area of the shaded figure = 84-30

=54 sq units

Hence, the area of the shaded REGION is 54 sq units.


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