Question

Find the area of triangle whose sides are 15,17,21 by heron's formula

Answer 1

Answer:

s= (a+b+c)/2

s= (15+17+21)/2

s=26.5

Step-by-step explanation:

by heron's formula

: under root ^s(s-a)(s-b)(s-c)

=under root^26.5(26.5-15)(26.5-17)(26.5-21)

=7237.8125sq.units

Answer 2

Answer:

hey here is yur answer

a=15

b=17

c=21

semi perimeter =S

S=a+b+c/2

=15+17+21/2

=53/2

=26.5

Area of triangle =roots s(s-a)(s-b)(s-c)

roots 26.5(26.5-15)(26.5-17)(26.5-21)

roots 26.5×11.5×9.5×5.5

Now find the answer by yourself

Step-by-step explanation:

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