Q&A for How to Construct a 90 Degrees Angle Using Compass and Ruler

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How do I draw a right angle triangle?

Donagan

Top Answerer

First construct a 90° angle as shown above. Extend each leg of the angle any convenient length. Draw a line from the end of one leg to the end of the other. You have a right triangle.

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Question

How do I construct a 15 degree angle?

Community Answer

First, make a 60 degree angle by constructing an equilateral triangle. Use angle bisection construction to make a 30 degree angle. Bisect the 30 degree angle again to make a 15 degree angle.

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Question

Can I draw a 133-degree angle?

Donagan

Top Answerer

There is no way to construct such an angle using a compass and a ruler. That's why they invented the protractor.

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Question

How do I construct 22.5 degree angles?

Community Answer

Start with the right angle, bisect it into two 45 degree angles, then bisect one of those into two 22.5 degree angles.

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How do I draw 45-degree angle?

Donagan

Top Answerer

First draw a 90° angle (as shown above), then bisect it. That gives you two 45° angles. See Construct a Bisector of a Given Angle .

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