Question

In A ABC. M and N are the midpoints of AB
and AC respectively. If AB = 8 cm, AC = 7 cm
and MN = 4.5 cm, find the perimeter of A ABC.

no irrelevant answer​

Answer 1

Answer:

Step-by-step explanation:  

So fist take a traingle and name the sides

after that write 1 ab- 8 cm

2 AC - 7 cm

3 = AB - write there qwestion mark than

perimeter 4.5

A+B+C= 8 + 7 + c = 4.5

15-4.5 = 11.5

√ s (s-a) (s-b) (s-c)

S = p = 42 =

     ↔    ↔   = 21

      2      2

2= √21(21-8) (21-7)(21-11.5)

√10+3+10+10+4+10.5                         So make equal

10+ 3+ 4+ 10.5

27.5 ans