Question

Two sides of a triangle are 6m and 7m. The perimeter of the triangle is 23m. What's the third side?

Answer 1

Hi !!!

Here is your answer,

Given : -
Perimeter of triangle = 23m
And two sides are 6m and 7m

Let the third side be x m

Perimeter of triangle = 23
➡sum of all sides of triangle = 23
➡6+7+x = 23
➡13+x = 23
➡x = 23 - 13
➡x = 10

Hence,third side = 10m


Hope it helps.

Answer 2

$perimeter \: of \: triangle = a + b + c \\ 23 \: m \: = 6 \: m + \: 7 \: m + c \\ 23 \: m = 13 \: m + c \\ 23 \: m - 13 \: m = c \\ 10 \: m = \: c$