Lesson Plan
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Angles, Triangles, Quadrilaterals, Circles and Related

For Teachers 6th - 8th
Students classify angles. In this angles lesson, students explore the characteristics of angles, triangles, quadrilaterals and circles. They identify polygons and sing a classifying angles song. Students participate in a manipulative...
Worksheet
Curated OER

Systems and Matrices

For Students 7th - 12th
In this algebra worksheet, students are asked to find replacement sets for modified problems. There are 39 questions with an answer key.
Worksheet
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Vertical Angles

For Students 10th
In this geometry worksheet, 10th graders investigate vertical angles, solve for vertical angles using equations that are equal and relate it to solving linear equation. There are 10 problems on this worksheet.
Worksheet
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Parallelogram Worksheet

For Students 10th - 11th
In this geometry activity, learners identify important properties of parallelograms. They identify properties of the sides, angles and diagonals. There identify special parallelograms also.
Worksheet
Curated OER

Basic Compass and Ruler Construction: Line Segment

For Students 8th - 11th
In this construction worksheet, students utilize a compass and a ruler to reconstruct a line segment and to combine two line segments together in 2 questions.
Lesson Plan
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Applying Proportionality in Scale Drawings

For Teachers 6th
Sixth graders examine a blue print and discuss the reasoning behind using blue prints. In this proportionality lesson plan,  students collaborate with their teammates to create a scale drawing. Once that is complete, 6th graders...
Lesson Plan
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Parallel and Perpendicular Lines

For Teachers 10th
Tenth graders explore parallel and perpendicular lines.  In this geometry instructional activity, 10th graders investigate the relationships associated with parallel lines and transversals, perpendicular lines, and the angles formed...
Lesson Plan
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Sled Kite Proportions

For Teachers 6th - 8th
Students build sled kites. in this kite building lesson, students must read directions for kite building and enlarge the proportions of the given kite pattern. Students focus on the angles and line of symmetry in their kite. 
Lesson Plan
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Symmetry and Tangrams

For Teachers 6th
Sixth graders build figures out of tangrams. In this symmetry lesson, 6th graders view tangrams and identify the polygons included in them. Students divide into groups, identify their tangram pieces, define the lines of symmetry, and use...
Lesson Plan
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Angling Your Way Through a Picture

For Teachers 5th - 7th
Students look at the geometry in an artwork. In this art history/geometry lesson, students research the artist Charles Sheeler and look at his painting Stacks in Celebration. They find the different types of lines, angles, and...
Lesson Plan
Key Curriculum Press

Properties of Special Parallelograms

For Teachers 9th - 11th Standards
Rhombuses, rectangles and squares are have special properties. In this lesson, young geometers investigate and make conjectures about diagonals, angles, and parallel lines of parallelograms. 
Lesson Plan
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Similar triangles

For Teachers 10th
Tenth graders investigate the theorems of ASA, AAS, AAA and ASA. In this geometry lesson, 10th graders discuss the theorems of triangles and how it is used to solve for missing sides or angles. They review how two angles are formed by...
Lesson Plan
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Talking about your name in math terms

For Teachers 1st - 2nd
Students talk about mathematical language.  In this talking about your name activity, students use the letters in their own name to review math vocabulary and concepts.  
Lesson Plan
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Quadrilaterals

For Teachers 10th
In this geometry worksheet, 10th graders solve problems with quadrilaterals. They calculate the sum of the angles, find missing angles and identify properties of quadrilaterals. There are 16 questions with an answer key.
Worksheet
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Regents Exam Questions GG 26: Contrapositive 2

For Students 10th - 12th
In this contrapositive instructional activity, students read logical statements.  Afterwards, they write equivalent statements as well as the inverse and converse of statements.  This three-page instructional activity contains...
Lesson Plan
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Mira, Mira on the Wall: Reflections

For Teachers 9th - 10th
Students investigate and perform reflections and symmetry. For this geometry lesson, students compare and contrast the relationship between reflections and symmetries.
Worksheet
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Challenge: Skills and Applications Lesson 3.3

For Students 9th - 12th
In this angle measures learning exercise, high schoolers solve 9 short answer problems. Students find values for x and y given two parallel lines cut by a transversal. High schoolers use alternate interior, supplementary, and exterior...
Worksheet
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Tests for Parallelograms Homework

For Students 9th - 12th
In this test for parallelograms worksheet, students solve 15 short answer problems. Students determine if a given sketch is a parallelogram given angle measures and/or side lengths. Students use knowledge of parallelograms to find...
Worksheet
Curated OER

Chapter 8: Circles

For Students 9th - 12th
In this circles instructional activity, students define and sketch 20 terms about circles. Students sketch radii, chords, diameters, secants, concentric circles, etc.
Worksheet
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Circles Terminology Multiple Choice

For Students 9th - 12th
In this circles worksheet, learners solve 10 multiple choice problems. Students answer questions about diameter and chord relationships, tangent lines to a circle, circumference, the Pi relationship, etc.
Interactive
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Trigonometry Applications

For Students 10th
In this geometry worksheet, 10th graders solve application word problems involving the use or right triangle trigonometry, including angle of elevation or depression. The one page interactive worksheet contains five questions. Hints,...
Lesson Plan
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IGD: Perpendicular Bisector

For Teachers 9th - 12th
Students draw perpendicular bisectors.  In this perpendicular bisectors lesson, students identify the perpendicular bisector in a polygon.  They use web tools to create and measure perpendicular bisectors.  Students...
Lesson Plan
Curated OER

Diagonals of Quadrilaterals

For Teachers 9th - 12th Standards
Teach your mathematicians how to identify different polygons based on their diagonals. Relating quadrilaterals to the different number of diagonals formed, students use the TI to create a visual of their shape.
Lesson Plan
Curated OER

Triangle Inequality Theorem

For Teachers 8th - 10th
Learners use the inequality theorem to solve triangles and their properties. In this geometry lesson, students are given spaghetti of different lengths and asked to create triangles. They conclude the necessary length needed to make a...

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