alleryStart learning →Which route gives a 45 degree angle using only ruler and compass?
ABuild 60 degrees, then bisect it
BBuild 90 degrees, then double it
CBuild 120 degrees, then bisect it
DBuild 90 degrees, then bisect it
Answer & Solution
Correct answer: D. Build 90 degrees, then bisect it
Half of a right angle is 45 degrees, and a right angle can be built and then bisected.
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