the area of right angled triangle is A=
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that could be 180. iam not sure
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ᴀʀᴇᴀ ᴏғ ʀɪɢʜᴛ ᴀɴɢʟᴇ ᴛʀɪᴀɴɢʟᴇ = 1/2(ʙᴀsᴇ × ᴘᴇʀᴘᴇɴᴅɪᴄᴜʟᴀʀ)
ɪғ ᴏɴᴇ ᴏғ ᴛʜᴇ ᴀɴɢʟᴇs ɪs 90°ᴀɴᴅ ᴛʜᴇ ᴏᴛʜᴇʀ ᴛᴡᴏ ᴀɴɢʟᴇs ᴀʀᴇ ᴇǫᴜᴀʟ ᴛᴏ 450 ᴇᴀᴄʜ, ᴛʜᴇɴ ᴛʜᴇ ᴛʀɪᴀɴɢʟᴇ ɪs ᴄᴀʟʟᴇᴅ ᴀɴ ɪsᴏsᴄᴇʟᴇs ʀɪɢʜᴛ ᴀɴɢʟᴇᴅ ᴛʀɪᴀɴɢʟᴇ, ᴡʜᴇʀᴇ ᴛʜᴇ ᴀᴅᴊᴀᴄᴇɴᴛ sɪᴅᴇs ᴛᴏ 90° ᴀʀᴇ ᴇǫᴜᴀʟ ɪɴ ʟᴇɴɢᴛʜ.
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