Question

c) An scalene triangle having sides 14 cm,
12 cm and 10 cm.​

Answer 1

Answer:

14+12+10=36 cm

Step-by-step explanation:

Step-by-step explanation:

perimeter is the total lenght of the sides of any shape

. hence we are given the sides of the triangle we can simply add them to get the perimeter

Answer 2

Answer:

The area of a triangle when the lengths of the three sides a, b, c are known is given by the Heron’s formula viz.,

Sq rt {s(s-a)(s-b)(s-c)} where s is the semi-perimeter of the triangle ………(1)

Now s = (a+b+c)/2 = (12+14+10)/2 = 18, s-a = 18–12 = 6, s-b = 18–14 =4 and s-c= 18–10 =8

Substituting theses values in (1) we have, sq rt {18(6)(4)(8) = 24 (rt 6) = 58.79

Therefore, the area of the required triangle is 58.79 sq.cm

I hope this answer will help