The diagram shows a triangle ABC. On the diagram,

- (a)
construct the bisector of angle ABC,
- (b)
construct the perpendicular bisector of BC,
- (c)
label the point P that is equidistant from B and C, and also equidistant from AB and BC.
It won't just hand you the answer — it asks where you're stuck.How the checker works
Worked solution
11(a)
1. Construct equal arcs from the vertex of the angle.
Place the compass point at . Draw an arc cutting and at two points.
2. Locate a point inside the angle equidistant from the two arms.
Without changing the compass width, place the compass point on each of the two arc-intersection points and draw two arcs inside so that the arcs intersect.
3. Draw the angle bisector.
Use a ruler to draw a straight line from through the intersection of the two arcs. This line is the bisector of .
The angle bisector of is drawn from to the opposite side .
11(b)
1. Construct equal arcs from $B$ and $C$ to locate two points equidistant from both endpoints.
Set the compass to a radius greater than half of . With centre , draw arcs above and below . Without changing the compass width, with centre , draw arcs above and below so that they intersect the first arcs.
2. Draw the perpendicular bisector through the two arc-intersection points.
Use a ruler to join the two arc-intersection points. This line is the perpendicular bisector of .
The perpendicular bisector of is drawn: a straight line crossing at its midpoint at .
11(c)
1. Identify and label the common point satisfying both equidistance conditions.
Since is equidistant from and , it lies on the perpendicular bisector of .
Since is equidistant from and , it lies on the angle bisector of .
Therefore, label at the intersection of these two constructed lines.
is labelled at the intersection of the angle bisector of and the perpendicular bisector of .
AI analysis — may contain mistakes.
Worked this one out on paper? Snap your steps and Gigle's AI math checker will circle the step where it went wrong.
More questions on this topic
- 1In this scale drawing, A, B and C are three corners of a park ABCD with C due north of B. Construct the perpendicular bi…
- 2In the scale drawing, PQRS represents a plot of land, which is to be used for a park. Scale 1 cm to 0.5 km Find the actu…
- 3The diagram shows a line segment PQ. Construct the perpendicular bisector of PQ, showing your constructions clearly. Ans…
- 4The diagram shows a quadrilateral PQRS. construct the perpendicular bisector of SR such that it meets PQ at point Z. Mar…
- 5已知三个点,,,则的外心的纵坐标是 A. B. C. …