Pupils learn the steps for basic constructions using a straightedge, a compass, and a pencil. Pairs develop the skills to copy a segment and an angle, bisect a segment and an angle, and construct parallel and perpendicular lines.

Concepts

geometric constructions, constructions, congruent angles, line segments, segments, angle bisectors, bisection, perpendicular bisectors, perpendicular lines, parallel lines

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Additional Tags

math

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Instructional Ideas

• Lead a discussion on why the constructions work and produce congruent figures
• Have the class brainstorm what other tools can be used to perform constructions, such as string and a pencil can replace a compass

Classroom Considerations

• Requires the tools for constructions, a straightedge, and compass

Pros

• Uses colors to show the construction marks
• Includes a list of extensions

Cons

• The figures are close together and may not provide enough space for the constructions

Common Core

HSG-CO.D.12 HSG-CO.D.13 MP5 MP6