Question

what is the sum of angle 3 and angle 5?​

Answer 1

Here's a pentagon, a 5-sided polygon. From vertex A we can draw two diagonals which separates the pentagon into three triangles. We multiply 3 times 180 degrees to find the sum of all the interior angles of a pentagon, which is 540 degrees.

Answer 2

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ᴛʜᴇ sᴜᴍ ᴏғ 3 ᴀɴɢʟᴇ ɪs ᴀʟᴡᴀʏs 180 ᴅᴇɢʀᴇᴇ