Question

two sides of atriangle is 15 cm and 19 cm. the perimeter of triangle is 45 cm what is the third side​

Answer 1

Answer:

ANSWER

Semiperimeter, S=18 cm

Let the side of the triangle be a,b,c such that

a=16 cm, b=14 cm

S=

2

a+b+c

=

2

16+14+c

18=

2

30+c

c=36−30=6 cm

Therefore, third side of triangle is 6 cm

Answered By

Answer 2

Answer:

11cm

Step-by-step explanation:

Two sides of the triangle = 15 , 19

Perimeter of the triangle = 45

Let the third side be x.

=> Perimeter of the triangle = Sum of three sides

=> 45 = 15 + 19 + x

=> 45 = 34+x

=> 45-34 = x

=> 11= x

X=11 cm

Therefore, the length of the third side is 11cm.