Math Problem Statement

Work out the bearing of point B from point A for Anson. The points form an equilateral triangle ABC, with point C due East of point B. You must show your working.

Solution

The problem describes a triangle ABCABC where all angles are the same, meaning it's an equilateral triangle.

Key observations:

  1. Triangle ABCABC is equilateral, so all angles are 6060^\circ.
  2. Point CC is due east of point BB, meaning the line BCBC is horizontal.
  3. You are asked to find the bearing of point BB from point AA. Bearings are measured clockwise from the north.

Steps to solve:

  1. Since ABCABC is equilateral, the angle at each vertex is 6060^\circ. Specifically, the angle BAC=60\angle BAC = 60^\circ.
  2. We also know that the line from BB to CC is horizontal (due east). This means the angle from north at point AA to the line ABAB is the same as the interior angle of the equilateral triangle.
  3. To calculate the bearing of BB from AA, note that the bearing is measured clockwise from north. Since the angle at AA is 6060^\circ and north points directly upward (vertically), the bearing is: Bearing of B from A=36060=300\text{Bearing of } B \text{ from } A = 360^\circ - 60^\circ = 300^\circ

Thus, the bearing of point BB from point AA is 300°.


Do you need more details or have any questions?

Related questions:

  1. What is the bearing of point CC from point BB?
  2. If point AA was directly north of point BB, what would the bearing be?
  3. How would the solution change if the triangle was not equilateral?
  4. Can you calculate the distance between points AA and BB if given the length of side BCBC?
  5. How does knowing that CC is due east of BB help in determining the solution?

Tip:

When working with bearings, always remember that they are measured clockwise from north.

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Math Problem Analysis

Mathematical Concepts

Geometry
Bearings
Equilateral Triangle

Formulas

Bearings: measured clockwise from north
Equilateral triangle: all angles = 60°

Theorems

Angle sum of a triangle is 180°
Bearings measured clockwise from north

Suitable Grade Level

Grades 7-9