Question

the sides of a triangle are 3 cm, 5cm and 6 cm. What is its area?
a) 2√3 cm²
b) 4√14 cm ²
c) 5√12 cm²
d) 2√5 cm²​

Answer 1

Answer: (a)1√3 cm²

Step-by-step explanation:

By Heron's Formula, area(A) is :

$A=\sqrt{s(s-a)(s-b)(s-c)}$

's' is the semi perimeter of the triangle which is s=7 cm

$A=\sqrt{s(s-a)(s-b)(s-c)}\\A=\sqrt{7(7-3)(7-5)(7-6)}\\A=\sqrt{7(4)(2)(1)}\\A=\sqrt{56}\\A=2\sqrt{14}$

Answer 2

Answer:

Here is your answer mate

Step-by-step explanation:

A=3cm

B=5cm

C=6cm

S = a+b+c/2

   = 3+5+6/2

   = 7cm

Use herons formula: $\sqrt{s*( s-a) (s-b) (s-c)}$

Input the values and you will get,   $2\sqrt{14}$ cm²

   

Hope you understood