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Lesson Plan
Curated OER

Indirectly Direct

For Teachers 4th - 8th
Students use prior knowledge of angle and lines as they conduct an experiment with a rolling marble to determine the shape of a mystery object located under a metal pie tin.
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Lesson Plan
Curated OER

Geometry/Math A Regents Questions: Angle Bisectors

For Teachers 9th - 12th
In this angle bisector worksheet, high schoolers solve five short answer and multiple choice problems. Students construct angle bisectors using a compass.
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Lesson Plan
Curated OER

Inscribing a Circle in a Triangle

For Teachers 9th - 12th Standards
Pupils investigate inscribing a circle in a triangle. They use Cabri Jr. to draw a triangle, locate the incenter, and use the distance from the incenter to a side of the triangle to inscribe a circle. The dynamic nature of the geometry...
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Lesson Plan
Curated OER

Investigating a Point on an ANgles Bisector

For Teachers 7th - 9th
Learners investigate points and angle bisectors. In this geometry lesson, students define angles, bisectors and perpendicular bisectors. They analyze angles and bisectors using Cabri software.
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Worksheet
Curated OER

Special Segments is a Triangle

For Students 10th
For this geometry worksheet, 10th graders examine the special segments that occur in a triangle.  The three page worksheet contains twenty-five problems.  Answers are not included.