Question

how many principal planes are projection are in orthographic projection?​

Answer 1

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2Pʀɪɴᴄɪᴘᴀʟ Pʟᴀɴᴇs

Profile plane, auxiliary vertical plane, and auxiliary inclined plane are also used as reference planes when two views of the object are not sufficient. 2.1. 2 Principal Planes Horizontal and Vertical planes are the principal planes used in orthographic projections (refer Figure 2.1). 2.1.

Answer 2

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sɪx ᴘʟᴀɴᴇs

ᴛʜᴇ ɢʟᴀss ʙᴏx ᴛʜᴇᴏʀʏ ɪs ᴄᴏᴍᴍᴏɴʟʏ ᴜsᴇᴅ ᴀs ᴀ ᴠɪsᴜᴀʟ ᴀɪᴅ ɪɴ ᴅᴇғɪɴɪɴɢ ᴏʀᴛʜᴏɢʀᴀᴘʜɪᴄ ᴘʀᴏᴊᴇᴄᴛɪᴏɴ. ɪᴍᴀɢɪɴᴇ ᴀ ʙᴏx ᴡɪᴛʜ ᴛʀᴀɴsᴘᴀʀᴇɴᴛ sɪᴅᴇs ᴛʜᴀᴛ ᴄᴏɴᴛᴀɪɴs ᴘᴏɪɴᴛ ᴏ. ᴛʜᴇ sɪx ᴘʟᴀɴᴇs ᴛʜᴀᴛ ᴍᴀᴋᴇ ᴜᴘ ᴛʜᴇ ʙᴏx ᴀʀᴇ ᴅᴇғɪɴᴇᴅ ᴀs ᴛʜᴇ ᴘʀɪɴᴄɪᴘᴀʟ ᴘʀᴏᴊᴇᴄᴛɪᴏɴ ᴘʟᴀɴᴇs. ᴛʜᴇ ᴘᴏɪɴᴛ ɪs ᴀssᴜᴍᴇᴅ ᴛᴏ ʜᴀᴠᴇ ᴀ ғɪxᴇᴅ ᴘᴏsɪᴛɪᴏɴ ɪɴsɪᴅᴇ ᴛʜᴇ ʙᴏx.