Question

Perimeter of a triangle is 18cm. The difference between its semi-perimeter and two of
its sides are 4cm and 5cm respectively. Find the measure of all the sides of this
triangle.​


pls someone help

Answer 1

Answer:

4,5 and 9 cm

Step-by-step explanation:

Perimeter of a triangle=18 cm

So, semiperimter= 18cm/2=9 cm

Let sides by x,y and z.

So, A.T.Q:

9-x=4

x=9-4

x=5 cm

And:

9-y=5

y=9-5

y=4 cm

And x+y+z=18 cm

5+4+z=18

z=18-9=9 cm