Question

Find the length of the third side of a Triangle if one side measures 10cm second 15cm and the Perimeter is 45cm.

Answer 1

Answer:

20cm

Step-by-step explanation:

perimeter = 10 + 15 + length of 3rd Side

45 = 25 + length of 3rd side

therefore,

length of 3rd side = 45 - 25 = 20cm

Answer 2

Answer:

The triangle has three sides, and the perimeter is given as 45cm.

Step-by-step explanation:

One side of Δ is 10cm

2nd side of Δ 15cm

perimeter is 45cm

so,10+15=25cm

we need to minus or subtract the perimeter 45cm from both the sides of the triangles that is

45-25cm=20cm

so the third side is 20cm.