Question

Can you please help me out?​

Answer 1

Step-by-step explanation:

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answer is 16 cm

Answer 2

Answer:

Consider a = 12 cm, b = 9.6 cm and c = 7.2 cm

We know that

S = Semi perimeter = (a + b + c)/ 2

Substituting the values

= (12 + 9.6 + 7.2)/ 2

= 28.8/2

= 14.4 cm

Here

\begin{aligned} &\text {Area of triangle}=\sqrt{s(s-a)(s-b)(s-c)}\\ &\text { Substituting the values }\\ &=\sqrt{14.4(14.4-12)(14.4-9.6)(14.4-7.2)}\\ &\text {By further calculation} \end{aligned}Area of triangle=

s(s−a)(s−b)(s−c)

Substituting the values

=

14.4(14.4−12)(14.4−9.6)(14.4−7.2)

By further calculation

Substituting the values

=

14.4(14.4−12)(14.4−9.6)(14.4−7.2)

=

14.4×2.4×4.8×7.2

=

6×2.4×2.4×2×2.4×3×2.4

We can write it as

=2.4×2.4×

6×6

So we get

=2.4×2.4×6

=34.56cm

2