lightbulb Key Concepts

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1. Basic Constructions

• Bisecting an Angle: Dividing an angle into two equal parts using a compass.
• Perpendicular Bisector: Constructing a line perpendicular to a segment through its midpoint.

2. Constructing Angles

• 60° Angle: Using the radius of the circle as the chord length.
• 90° Angle: Bisecting the straight angle or using the 60°/120° method.

3. Triangle Constructions

• Given three sides (SSS).
• Given base, base angle, and sum/difference of other two sides.
• Given perimeter and base angles.