Question

mathematics plz answer​

Answer 1

Answer:

semi-permeter of the triangle = 10 cm

so, total perimeter = 10x2 = 20 cm

length of 1 side = 5 cm

length of 2nd side = 7 cm

now, length of 3rd side = 20-(5+7)

= 20-12

= 8cm

so,length of 3rd side is 8 cm

Step-by-step explanation:

hope this helps you