Question

Find side of equilateral triangle if perimeter is equal to 51 cm​

Answer 1

Step-by-step explanation:

$let \: the \: side \: of \: equailateral \: triangle \: be \: x \\ perimeter \: = x + x + x \\ 51= 3x \\ x = \frac{51}{3} \\ x = 17$

sides of equilateral triangle is 17

Answer 2

$\huge \sf \blue{Answer}$

Given :

• ᴘᴇʀɪᴍᴇᴛᴇʀ ᴏғ ᴇǫᴜɪʟᴀᴛᴇʀᴀʟ ᴛʀɪᴀɴɢʟᴇ ɪs 51 ᴄᴍ

To find :

• sɪᴅᴇ ᴏғ ᴇǫᴜɪʟᴀᴛᴇʀᴀʟ ᴛʀɪᴀɴɢʟᴇ

Formula :

• ᴘᴇʀɪᴍᴇᴛᴇʀ = sᴜᴍ ᴏғ ᴀʟʟ sɪᴅᴇs

Solution :

$\sf{let \: the \: equilateral \: side \: be \: x..}$

$\sf{ \rightarrow \: 51 = x + x + x}$

$\sf{ \rightarrow \: 51 = 3x}$

$\sf{ \rightarrow \: x = \frac{51}{3} }$

$\sf{ \rightarrow \: x = 17}$

$\sf{∴ \: the \: side \: of \: equilateral \: triangle \: is \: 17 \: cm}$