Question

15. A wire is in the shape of a regular pentagon of side 12 cm. It is rebent into the
shape of a rectangle whose length is 3
breadth of the rectangle.​

Answer 1

Answer:

ɢɪᴠᴇɴ ᴀ ᴡɪʀᴇ ɪs ɪɴ sʜᴀᴘᴇ ᴏғ ʀᴇᴄᴛᴀɴɢʟᴇ

ᴡʜᴇʀᴇ

ʟᴇɴɢᴛʜ= ᴄᴍ.

ʙʀᴇᴀᴅᴛʜ= ᴄᴍ.

ᴘᴇʀɪᴍᴇᴛᴇʀ ᴏғ ʀᴇᴄᴛᴀɴɢʟᴇ =(ʟ+ʙ)

=()

[ᴘᴇʀɪᴍᴇᴛᴇʀ = ᴄᴍ.]

ɴᴏᴡ ᴏғ ᴡɪʀᴇ ɪs ʙᴇɴᴛ ɪɴ sʜᴀᴘᴇ ᴏғ sǫᴜᴀʀᴇ

ᴡʜᴇʀᴇ sɪᴅᴇ =ᴀ ᴄᴍ

ɴᴏᴡ

ᴘᴇʀɪᴍᴇᴛᴇʀ ᴏғ ʀᴇᴄᴛᴀɴɢʟᴇ = ᴘᴇʀɪᴍᴇᴛᴇʀ ᴏғ sǫᴜᴀʀᴇ

=ᴀ

[ᴀ=ᴄᴍ]