Bisecting one angle, likewise called building the angle bisector, using just a straightedge and a compass is what i will show you here.

You are watching: How to bisect an obtuse angle

You may realize the it is a lot easier than copy angles.I will show you the actions to bisect an acute angle. The steps are tho the same once the angle is ideal or obtuse.Therefore, study the steps outlined right here carefully and also you will have the ability to bisect any angle.Bisect edge A:
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Step 1:
Place the needle that the compass in ~ vertex A and also draw an arc of any size.Call the points where the arc intersects the rays, B and C.
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Step 2:
Open the opening of your compass to a distance greater than the distance you used to attract the arc above.Then, maintaining the opened of the compass the same, placed the needle the the compass at B and also draw and arc.And put the needle of the compass in ~ C and draw and arc.
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Bisecting an angle by developing an equilateral triangle inside the angle.

This way of bisecting an edge is less common, but it is precious knowing just how to do it. This time, we will bisect an obtuse angle.

Start through an angle called with 3 point out such together angle EFG.


Step 1:Choose a allude on EF and call the H. Then, pick a allude on FG, contact it I, and also make sure that FH = FI.To ensure that FH = FI, you should use her compass, measure up the length of FH, and also use the same length for FI. 


Step 3:Using hi as among the three sides of an it is provided triangle, build an it is provided triangle.Step 4:Using her compass, measure the size of HI. Step 5:Keeping your compass opening the same, put the needle of the compass at H and also draw one arc. Then, still making use of the same opening, placed the needle of the compass in ~ I and draw one arc.

Call the allude of intersection that the arcs k and you should end up with the following figure.

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