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Q: What are the two angle measures that can be trisected with a straightedge and compass?

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A compass and a straightedge

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no

True

Related questions

An angle of 65° can not be trisected using a compass and straight edge.

45 and 90 degree angles

A compass and a straightedge

First things first, the actual statement isn't "you can't trisect an angle" but rather "you can't trisect one with only a compass and straightedge." Some angles can be easily trisected--a 90-degree angle trisects into 30-degree segments-but to do it you need a protractor. Anyway, to check your work measure the angle you trisected and divide by three. If your trisections match, you got it right.

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Yes

True.

Use a protractor to measure the angle. Divide that number by 3 and that is the required angle. In general, an angle cannot be trisected using a compass and straight edge.