alleryWhen bisecting an angle, what is the first circle's centre?
AA point on one arm
BThe vertex of the angle
CThe midpoint of the arc
DA point on the bisector
Answer & Solution
Correct answer: B. The vertex of the angle
1. Place the compass point on the vertex and draw a circle meeting both arms.
2. The two meeting points are equally far from the vertex.
3. Then draw equal circles from those two points; they cross on the bisector.
_Source: Wikipedia, Bisection, section Angle bisector_
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