Overview
Triangles and Constructions

Angle Bisectors and Incircles

 Video Tutorial

Key Aspects:
  • Angle Bisectors
  • Constructing Angle Bisectors
  • Characteristic of Angle Bisectors
  • Constructing a Triangle’s Incircle Using Angle Bisectors
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 Revision Cards

1) Angle Bisectors

Angle bisector dividing an angle into two equal parts, with one half labelled α/2 and the other half also labelled α/2.

2) Drawing Angle Bisectors

Constructing an angle bisector using a protractor and compass, showing steps for accurate measurement and drawing.

3) Property of Angle Bisectors

Key property of angle bisectors shown with diagram: every point on the angle bisector is equidistant from the angle's sides.

4) Using Angle Bisectors to Construct a Triangle's Incircle

Explanation of a triangle's in-centre and in-circle, showing the largest circle that can fit inside the triangle, with in-radius and angle bisectors.

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 Exercises

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