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Koch Snowflake

For Teachers 9th - 10th
Students investigate Koch's Snowflake. In this geometry instructional activity, students identify the properties of creating Koch's snowflake. They solve problems dealing with fractals and patterns.
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Fractals: Koch Snowflake

For Teachers 9th - 11th
Students investigate the properties of Koch's snowflake. In this geometry lesson, students investigate fractals and patterns. They create Koch's snowflake using Cabri software.
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Constructing Triangles

For Teachers 9th - 10th
Students construct triangles. In this geometry instructional activity, students create equilateral triangles. They also construct triangles where the sides are different. They use the lab to create and move shapes around with the Cabri...
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Dividing Line Segments into n Congruent Parts

For Teachers 9th - 10th
Learners identify lines, and line segments. In this geometry lesson, students divide line segments into equal congruent parts. They complete a laboratory activity dealing with lines and segments.
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Incenter of a Triangle

For Teachers 10th
Tenth graders find the incenter of a triangle. In this geometry lesson, 10th graders define the way to create an incenter with an angle bisector. They differentiate between incenter and incircle.
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Orthocenter Of a Triangle

For Teachers 8th - 10th
Students find the orthocenter of a triangle. In this geometry lesson, students identify where the altitudes meet in a triangle. They use Cabri software to explore acute, obtuse and right triangles.
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SAS Similarity Theorem

For Teachers 9th - 10th
Students identify and use the similarity theorem. In this geometry lesson, students differentiate between congruent and similar triangles. They solve problems using the computer modifying shapes by dragging.
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Similar Triangles on the Coordinate Plane

For Teachers 9th - 10th
Students investigate triangles and their properties. In this geometry instructional activity, students differentiate between similar and congruent triangles. They use the SSS theorem to help identify the triangles that are similar or...
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Triangles with Collinear Circumcenters

For Teachers 9th - 10th
Students identify the circumcenter of a triangle. In this geometry lesson, students construct a perpendicular bisector using a straight edge and a compass. They differentiate between triangles and collinear points.
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Triangle Side Lengths and Angles Measures

For Teachers 9th - 10th
Students identify missing sides and angles. In this geometry lesson, students use triangular theorems to identify the missing sides. They use the Pythagorean Theorem to find the different ratios of each side.
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Median of a Trapezoid

For Teachers 8th - 10th
Learners find the median of trapezoids and other polygons. In this geometry lesson, students identify important properties of trapezoids. They create trapezoids and polygons using Cabri software.
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Tessellations

For Teachers 9th - 10th
Students create tessellations. In this geometry instructional activity, students use polygons to create different patterns by rotation. They identify the reasons for polygons to create the type of tessellation it does.
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The Dragon Curve Fractal

For Teachers 8th - 11th
Learners identify the properties of a dragon curve. In this geometry instructional activity, students identify sequences and patterns as they solve fractals. They investigate patterns found in nature.
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Dream Bedroom Floor Plan

For Teachers 9th - 10th
Students construct using Cabri software. In this geometry instructional activity, students convert between units and apply the correct measurements to build objects. They create the room virtually and manipulate the shapes to the desired...
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Exploring Angle Pair Relationships

For Teachers 9th - 11th
Learners investigate the relationship between angles of triangles. In this geometry lesson, students identify properties of right and non-right triangles. They differentiate between vertical and supplementary angles.
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Exploring Angle/Pair Relationships

For Teachers 7th - 10th
Students find missing angles and sides of triangles. In this geometry lesson, students create intersecting lines to measure angles. They use Cabri Software to create virtual angles.
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Finding the Area of a Parallelogram with Translations

For Teachers 8th - 10th
Students calculate the area of a parallelogram. In this geometry lesson, students perform translation using a coordinate plane and coordinate pairs. They perform translation on other polygons.
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Finding the Area of a Parallelogram with Translations

For Teachers 8th - 10th
Students calculate the area of parallelograms. In this geometry lesson, students identify properties of parallelograms and use to to solve problems. They create polygons using Cabri software.
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Investigating Pythagorean Triples

For Teachers 9th - 10th
Learners investigate and solve Pythagorean triples. In this geometry activity, students find the missing sides and angles of a right triangle. They graph right triangles and move the sides around to create different angles.
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Investigating the Pythagorean Triples

For Teachers 9th - 10th
Students investigate the Pythagorean triples. In this geometry lesson, students solve for different parts of a right triangle. They identify the missing side or angle using the pythagorean theorem.
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Investigating the Sierpinski Triangle

For Teachers 9th - 11th
Students solve and analyze the sierpinski's triangle. In this geometry lesson, students identify properties and theorem of triangles. They solve problems involving angles and sides of triangles.
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The Sierpinski Triangle

For Teachers 9th - 10th
Students investigate the Sierpinski triangle. In this geometry instructional activity, students define fractal curves and its relationship to triangles. They identify repeating sequences and relate it to fractals.
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Mapping Natural Disasters

For Teachers 9th - 12th
High schoolers use Cartesian coordinates to plot current natural disasters. They relate location of natural disasters to their specific major project countries. Students tie in geometry within this lesson as connected to spatial...
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Constructing Perpendiculars

For Teachers 9th - 10th
Students construct perpendicular lines. In this geometry lesson, students use a compass and straight edge to do construction. They start from a point to a line.

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