Lesson Plan
Curated OER

Betweenness and the Sum of Parts

For Teachers 9th - 12th Standards
High schoolers differentiate lines and angles using betweenness in this geometry lesson plan. They differentiate angles and lines using Cabri Jr. and analyze the data and make conjecture.
Lesson Plan
Curated OER

Opposite Angles in a Cyclic Quadrilateral

For Teachers 9th - 12th Standards
Learners investigate cyclic quadrilaterals in this geometry lesson. They use Cabri Jr to explore the sum of the measures of opposite angles in a cyclic quadrilateral. The dynamic nature of Cabri allows students to form and verify...
Lesson Plan
Curated OER

Exploring Characteristics of Triangles

For Teachers 9th - 11th
Students draw triangles and explore the classification of each using the measures of interior angles and lengths of sides. They investigate the sum of the interior angles of various triangles and conjecture and prove the theorem: The...
Worksheet
Curated OER

Right Triangle Trigonometry

For Students 12th
In this trig worksheet, 12th graders identify the angles of a tight triangle using sine, cos and tan combined with the given sides. There are 23 problems broken down in 4 sections.
Worksheet
Curated OER

Identify the Shape

For Students 9th - 10th
10 this geometry learning exercise, students identify the different angles created by polygons and name the shape created based on the number of sides. There is an answer key.
Lesson Plan
Curated OER

Pendulums on the Moon

For Teachers 6th - 8th
Students conduct experiments to determine if length, mass, or starting angle has any effect on the rate of a pendulum's swing. They also conduct an experiment online to determine if gravitational force plays a role in the swing. Groups...
Worksheet
Curated OER

Angles: Prove It!

For Students 5th - 6th
In this angle worksheet, students first draw a set of intersecting lines, then use a protractor to complete a set of instructions about angles and answer related questions. Answers included on page 2.
Worksheet
Curated OER

Angles of Time

For Students 4th - 5th
In this angles of time worksheet, students draw an hour hand on a clock to represent given angles and show a time, then "write about it." Answers included on page 2.
Lesson Plan
Curated OER

Exploring Angle Pair Relationships

For Teachers 9th - 11th
Students 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.
Worksheet
Curated OER

Concurrent Lines, Medians and Altitudes

For Students 9th - 10th
In this geometry learning exercise, students construct angles and identify medians and altitudes. They use a compass and protractor to perform heir construction. There are 28 questions.
Worksheet
Curated OER

Constructing angles

For Students 3rd - 4th
In this angle worksheet, students read a selection on angles and complete three short answer activities about right angles.
Worksheet
Curated OER

Wave Terms and Concepts

For Students 9th - Higher Ed
In this waves activity, students define 23 vocabulary words associated with the different types of waves and how waves are measured. Students complete 23 matching terms with definitions and draw the superposition of two waves shown.
Worksheet
Curated OER

Quadrilaterals and Other Polygons: Practice

For Students 5th - 6th
In this polygons instructional activity, students classify each polygon in as many was possible. Students then write polygon or not a polygon to classify each figure. Students find the measure of the missing angles and complete two test...
Lesson Plan
Curated OER

Angles Lesson Plan

For Teachers 3rd - 5th
Students stud angles, and then play the "What's Your Angle?" game. They complete at least 10 computer generated problems from the Angles Applet.
Unit Plan
PBS

Accessible Shapes

For Teachers 6th - 8th Standards
All the 2-D and 3-D measurement work you need is in one location. Divided into three sections, the geometry lesson plans consist of visualization of three dimensions, classifying geometric figures, and finding surface area and volume....
Worksheet
Curated OER

Identify Triangles: Acute, Right, Obtuse, Straight

For Students 5th - 6th
In this triangles worksheet, students draw angles with given measurements and identify each as either acute, right, obtuse or straight. A reference web site is given for additional activities. 
Assessment
Inside Mathematics

Rhombuses

For Teachers 9th - 12th Standards
Just what does it take to show two rhombuses are similar? The assessment task asks pupils to develop an argument to show that given quadrilaterals are rhombuses. Class members also use their knowledge of similar triangles to show two...
Lesson Plan
Curated OER

Sum of Interior/Exterior Angles with Wilbur

For Teachers 7th - 10th
Students identify the interior and exterior measures of polygons. In this geometry lesson, students identify the formula for interior angles of polygons. They differentiate between triangular and polygons angles.
Lesson Plan
Curated OER

Investigating the Shapes of Covalent Molecules and Measuring their Respective Bond Lengths and Bond Angles

For Teachers 9th - 12th
High schoolers will draw Lewis structures of common covalent compounds using a Chem 3D computer program. They will predict the shapes of the molecules, complete a data table, and formulate rules for predicting shapes of molecules. In the...
Lesson Plan
Curated OER

How High did My Rocket go?

For Teachers 7th - 9th
Students shoot off a rocket and measure the trig ratios relation. In this geometry instructional activity, students practice using an inclinometer to figure out how high their rockets fly. They measure angles and height and relate it to...
Lesson Plan
Curated OER

Interior and Exterior Angles of Polygons

For Teachers 9th - 10th
Students identify interior and exterior angles of polygons. In this geometry lesson plan, students add interior and exterior angles of polygons. They use angle theorems to solve the problems.
Lesson Plan
Curated OER

The Three Bears: Comparing and Ordering

For Teachers K - 1st
Students explore comparing and ordering volume of containers. They use the context of Goldilocks and the Three Bears to compare the volume of various containers by packing or pouring.
Worksheet
Curated OER

Polygons Homework

For Students 9th - 12th
In this polygons learning exercise, students identify polygons that contain given parameters.  They write definitions of polygons.  Students find the measurement of exterior and interior angles of regular polygons.  This...
Lesson Plan
Texas Instruments

Cabri Jr. Inscribed and Central Angles

For Teachers 9th - 12th Standards
Learners will differentiate between inscribed and central angles in this geometry lesson. They answer questions dealing with circles as they relate to inscribed triangles and angles. This assignment includes a printable worksheet.

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