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

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  • Question
    How do I draw a right angle triangle?
    Donagan
    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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    Not Helpful 11 Helpful 32
  • Question
    How do I construct a 15 degree angle?
    Community Answer
    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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    Not Helpful 13 Helpful 25
  • Question
    Can I draw a 133-degree angle?
    Donagan
    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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    Not Helpful 17 Helpful 22
  • Question
    How do I construct 22.5 degree angles?
    Community Answer
    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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    Not Helpful 4 Helpful 8
  • Question
    How do I draw 45-degree angle?
    Donagan
    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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    Not Helpful 7 Helpful 6
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