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# CONSTRUCTION

CONTENT

1. Construction of Special Angles (Revision)
2. Construction of Triangles: (i) Two Sides and an Included Angle (ii) Two Angles and a Side between Them (ii) Three Sides
3. Bisecting Angles: Bisecting Angle 90, 60 and any Given Angles

## Construction of Special Angles (Revision)

A compass, a pencil, a protractor and a ruler are the needed mathematical instruments for this construction. Angles 30°, 45°, 60°, 90° and their multiples should be thoroughly revised as a prerequisite for the next stage.

## Construction of Triangles

### Two Sides and an Included Angle

An included angle is an angle holding two sides of the triangle.

Example 1:

A protractor, a pencil and a ruler are the needed mathematical instruments for this construction.

Construct a triangle ABC, such that AB = 4cm, BC = 6cm, ∠B = 62°. Measure AC.

Solution Steps:

1. Make a rough sketch of the triangle. 2. Draw the line BC = 6cm

3.

Lesson tags: JSS2 Mathematics, JSS2 Mathematics Evaluation Questions, JSS2 Mathematics Evaluation Questions Third Term, JSS2 Mathematics Objective Questions, JSS2 Mathematics Objective Questions Third Term, JSS2 Mathematics Third Term, Mathematics Lesson Notes, Mathematics Objective Questions
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