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This vetted resource aligns to concepts or skills in these benchmarks.Related Videos

Reflect for a moment on how to measure tall objects with mirrors and mathematics.

Unlock an effective teaching strategy for teaching geometric constructions, specifically perpendicular bisectors, in this Teacher Perspectives video for educators.

Unlock an effective teaching strategy for making connections in geometric constructions in this Teacher Perspectives video for educators.

Unlock an effective teaching strategy for helping students discover the triangle inequality theorem in this Teacher Perspectives video for educators.

Students will use segment constructions to verify and demonstrate the golden ratio. These proportional relationships connect the golden ratio to the ancient Greek ideal of beauty, balance, and harmony.

Students will construct congruent segments on one ray of an angle and learn how to use a geometry set to create parallel lines to partition the other ray into a given ratio. The results are verified using corresponding angles and similar triangles.

Students will use the construction of a perpendicular bisector to verify the Triangle Inequality Theorem. They will relate the radius of the compass needed to create intersecting arcs to the side-length conditions required for a triangle to exist.

Students will construct bisectors of segments to verify definitions and constructions of midpoints, medians, altitudes, the orthocenter, centroid, circumcenter, and the converse of the perpendicular bisector theorem, leading to the discovery of the Euler Line.

What better way to demonstrate that all circles are similar then to use pizzas! Gaines Street Pies explains how all pizza pies are similar through transformations.
Download the CPALMS Perspectives video student note taking guide.