Question

The area of triangle whose three sides are 3 cm ,4 cm and 5 cm is ________ sq. cm ..60 sq.cm

12 sq.cm

6 sq.cm

9 sq.cm

​

Answer 1

Answer:

I hope it will help you

plz mark me as brainliest

Answer 2

Given :

• Sides are 3cm,4 cm, and 5 cm

To find :

• The area of triangle

According to the question,

We will find the area by using Heron's formula

$\implies\sf{ \frac{a + b + c}{2} }$

$\implies \sf{ \frac{3 + 4 + 5}{2} }$

$\implies \sf{ \cancel \frac{12}{2} = 6 \: cm }$

Area of triangle $\implies \sf{ \sqrt{s(s - a)(s - b)(s - c)} }$

$\implies \sqrt{ \sf{6(6 - 3)(6 - 4)(6 - 5)}}$

$\implies\sf{ \sqrt{6(3)(2)(1)} }$

$\implies \sf{ \sqrt{2 \times 3 \times 3 \times 2 \times 1} }$

$\implies \sf{2 \times 3 \times 1}$

$\implies { \green{\boxed{\sf{6 \: cm{}^{2}}}}}$

So,option 3rd is correct...