Question

if the perimeter of a triangle is 12 cm and it's intadius is 1 cm then find its area​

Answer 1

Answer:

Given perimeter of equilateral triangle is 12 cm

Then length of side=

3

perimeter

=

3

12

=4 cm

We know that medians m of equilateral triangle=

2

3

a (where a is the length of sides)

∴m=

2

3

4⇒m=2

3

cm

Answer 2

Step-by-step explanation:

Area of triangle = inradius×semi perimeter

area of triangle =1×6

area=6cm2