show that the diagonals of a parallelogram divide it into four triangles of equal areas
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Hᴇʏ ᴍᴀᴛᴇ ! ʜᴇʀᴇ ɪs ʏᴏᴜʀ ᴀɴsᴡᴇʀ.
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Gɪᴠᴇɴ:- Aʙᴄᴅ ɪs ᴀ ᴘᴀʀᴀʟʟᴇʟᴏɢʀᴀᴍ
Tᴏ ᴘʀᴏᴠᴇ :- Tʜᴇ ᴅɪᴀɢᴏɴᴀʟs AC ᴀɴᴅ BD ᴅɪᴠɪᴅᴇ ᴛʜᴇ Pᴀʀᴀʟʟᴇʟᴏɢᴍ ABCD ɪɴᴛᴏ ғᴏᴜʀ ᴛʀɪᴀɴɢʟᴇs ᴏғ ᴇϙᴜᴀʟ ᴀʀᴇᴀ
Cᴏɴsᴛʀᴜᴄᴛɪᴏɴ:-Dʀᴀᴡ BL ⊥ AC.
Sᴏʟᴜᴛɪᴏɴ:-Sɪɴᴄᴇ ABCD ɪs ᴀ ᴘᴀʀᴀʟʟᴇʟᴏɢʀᴀᴍ ᴀɴᴅ sᴏ ɪᴛs ᴅɪᴀɢᴏɴᴀʟs ᴀᴄ ᴀɴᴅ ʙᴅ ɪɴᴛᴇʀsᴇᴄᴛ ᴇᴀᴄʜ ᴏᴛʜᴇʀ ᴀᴛ ᴏ.
Tʜᴇʀᴇғᴏʀᴇ AO = OC ᴀɴᴅ BO = OD
Nᴏᴡ, ᴀʀ (AOB) = 1/2 × AO × BL
ᴀʀ (OBC) = 1/2 × OC × BL
Bᴜᴛ AO = OC
Tʜᴇʀᴇғᴏʀᴇ ᴀʀ (AOB) = ᴀʀ (OBC)
Sɪᴍɪʟᴀʀʟʏ, ᴡᴇ ᴄᴀɴ sʜᴏᴡ ᴛʜᴀᴛ
ᴀʀ (OBC) = ᴀʀ (OCD) ; ᴀʀ (OCD) = ᴀʀ(ODA) ;
ᴀʀ (ODA) = ᴀʀ (OAB) ; ᴀʀ (OAB) = ᴀʀ (OBC)
ᴀʀ (OCD) = ᴀʀ (ODA)
Tʜᴜs , ᴀʀ (OAB) = ᴀʀ (OBC) = ᴀʀ(OCD) = ᴀʀ (OAD)
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ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs
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Gɪᴠᴇɴ:- Aʙᴄᴅ ɪs ᴀ ᴘᴀʀᴀʟʟᴇʟᴏɢʀᴀᴍ
Tᴏ ᴘʀᴏᴠᴇ :- Tʜᴇ ᴅɪᴀɢᴏɴᴀʟs AC ᴀɴᴅ BD ᴅɪᴠɪᴅᴇ ᴛʜᴇ Pᴀʀᴀʟʟᴇʟᴏɢᴍ ABCD ɪɴᴛᴏ ғᴏᴜʀ ᴛʀɪᴀɴɢʟᴇs ᴏғ ᴇϙᴜᴀʟ ᴀʀᴇᴀ
Cᴏɴsᴛʀᴜᴄᴛɪᴏɴ:-Dʀᴀᴡ BL ⊥ AC.
Sᴏʟᴜᴛɪᴏɴ:-Sɪɴᴄᴇ ABCD ɪs ᴀ ᴘᴀʀᴀʟʟᴇʟᴏɢʀᴀᴍ ᴀɴᴅ sᴏ ɪᴛs ᴅɪᴀɢᴏɴᴀʟs ᴀᴄ ᴀɴᴅ ʙᴅ ɪɴᴛᴇʀsᴇᴄᴛ ᴇᴀᴄʜ ᴏᴛʜᴇʀ ᴀᴛ ᴏ.
Tʜᴇʀᴇғᴏʀᴇ AO = OC ᴀɴᴅ BO = OD
Nᴏᴡ, ᴀʀ (AOB) = 1/2 × AO × BL
ᴀʀ (OBC) = 1/2 × OC × BL
Bᴜᴛ AO = OC
Tʜᴇʀᴇғᴏʀᴇ ᴀʀ (AOB) = ᴀʀ (OBC)
Sɪᴍɪʟᴀʀʟʏ, ᴡᴇ ᴄᴀɴ sʜᴏᴡ ᴛʜᴀᴛ
ᴀʀ (OBC) = ᴀʀ (OCD) ; ᴀʀ (OCD) = ᴀʀ(ODA) ;
ᴀʀ (ODA) = ᴀʀ (OAB) ; ᴀʀ (OAB) = ᴀʀ (OBC)
ᴀʀ (OCD) = ᴀʀ (ODA)
Tʜᴜs , ᴀʀ (OAB) = ᴀʀ (OBC) = ᴀʀ(OCD) = ᴀʀ (OAD)
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ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs
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PalakBansal:
welcome ^_^
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