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Worksheet
Curated OER

Special Triangles and Quadrilaterals

For Students 9th - 11th
For this special triangles worksheet, learners examine given special triangles.  They determine the length of a missing side and/or the measurement of a missing angle for given triangles and quadrilaterals.  Students justify...
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Instructional Video20:08
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Flipped Math

Trig Ratios

For Students 9th - 12th Standards
Take ratios of sides to a new level. Pupils learn the definitions of the three basic trigonometric ratios in right triangles. Using the definitions, scholars find missing lengths in right triangles, based on a known angle. Individuals...
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Worksheet
Mt. San Antonio Collage

Circles

For Students 9th - 12th Standards
Don't circle around the topic, but get right to the center with tons of practice regarding circles in geometry. The note-incorporated activity provides guided practice through many topics such as central angles, inscribed polygons...
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Worksheet
Curated OER

Similar and Congruent Shapes

For Students 5th - 6th
In this similar-congruent worksheet, students determine measures of unknown angles, draw congruent shapes and determine whether shapes are congruent. A reference web site is given for additional activities.
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Worksheet
Curated OER

Vertical Angles

For Students 10th
In this geometry instructional activity, 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 instructional...
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Lesson Plan
Curated OER

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. 
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Worksheet
Lane Community College

Review Sheets: Geometry

For Students 8th - 11th
Full of problems with polygons, angles, lines, and triangles, your learners get a multi-page packet that provides all they need to know. It contains many of the standard problem types as well as some more challenging questions. 
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Lesson Plan
Curated OER

Congruent Triangles

For Teachers 10th
Tenth graders explore congruent triangles.  In this geometry lesson, 10th graders investigate the conditions necessary to prove two triangles are congruent by SSS, ASA, AAS, or SAS. 
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Lesson Plan
Curated OER

CSI Investigation of Congruence and Similarity

For Teachers 9th - 12th
Students differentiate between similarity and congruence using polygons. In this geometry lesson, students label triangles based on their properties. They find missing sides and angles using the interior sum theorem.
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Lesson Plan
Curated OER

An Introductions to Congruent Polygons

For Teachers 8th - 10th
Learners differentiate between similar and congruent polygons. In this geometry lesson, students define the theorems and reasons for polygons similarity and congruence. They are given pictures and patterns to differentiate and identify.
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Lesson Plan
Curated OER

Why can't We Use SSA to Prove Triangles Congruent?

For Teachers 9th - 10th
Pupils investigate triangles and congruences. In this geometry lesson, students differentiate between inductive and deductive reasoning. They differentiate between similar and congruent triangles.
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Lesson Plan
Curated OER

Analyzing Body Angles

For Teachers 10th - 12th
Students investigate angles of polygons. In this geometry lesson, students identify the relationship between angles and the number of sides in a polygon. They differentiate between sumilarity anf congruence in angles and sides.
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Worksheet
Curated OER

Eighteen SSS or SAS Triangle Congruence Problems

For Students 9th - 10th
In this triangle congruence worksheet, students state if triangles are congruent and if the congruence is based on side, side, side or the side, angle, side theorems in eighteen problems.  The solutions are found on the last two pages.
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Lesson Plan
Curated OER

Measuring Body Angles

For Teachers 8th - 10th
Learners use technology to graph and compare angles. For this geometry lesson, students range of motion in the environment. They identify the missing parts of polygons using similarity and congruence.
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Lesson Plan
Curated OER

Angle Action 1,2 and 3

For Teachers 8th - 10th
Students investigate angles through construction. In this geometry lesson, students use a protractor to identify the measurement of an angle. They identify angles cut by a transversal and two parallel lines.
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Worksheet
Curated OER

Angles and Parallel Lines

For Students 8th - 10th
In this geometry worksheet, students identify the interior and exterior angles of parallel lines cut by a transversal. There are 11 questions with an answer key.
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Worksheet
Curated OER

Geometric Proof and Angles

For Students 10th
In this geometry learning exercise, 10th graders write two-column and paragraph proofs to prove angle pair relationships.  The one page learning exercise contains five problems.  Answers are not included. 
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Worksheet
Curated OER

Three- and Two- Dimensional Geometry

For Students 7th
In this three- and two- dimensional geometry worksheet, 7th graders solve 12 various problems related to geometric shapes and measurement. They first use paper and a pencil to sketch the front, side, back, top and bottom views of each...
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Worksheet
Curated OER

Triangle Similarity

For Students 10th
In this triangle similarity worksheet, 10th graders solve and complete 12 different problems that include defining similar and 3 similar statements using only sides and angles. First, they determine if each pair of triangles shown are...
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Interactive
Curated OER

Similar Figures

For Students 7th - 10th
In this similar figures worksheet, students identify the meaning of similar, corresponding sides, and congruent.  They use proportions to find the length of a missing side.  Students dilate given figures according to a scale...
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Lesson Plan
Curated OER

Geometry is Fun and EverywhereGeometry, You Don’t Care? Geometry is Fun and Everywhere

For Teachers 3rd
Third graders investigate shapes in our world. In this geometry lesson, 3rd graders describe plane and solid shapes and identify angles, solid objects and lines of symmetry. Students use online resources, graphic organizers and conduct...
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Worksheet
Curated OER

Hands On: Construct Triangles and Rectangles

For Students 4th - 7th
In this congruent triangles and rectangles worksheet, students solve 6 word problems where they identify whether triangles and rectangles are congruent, and construct triangles. Students must explain their reasoning and prove each answer.
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Lesson Plan
Curated OER

Around The Stop Sign

For Teachers 6th - 12th
Students analyze a drawing of a regular octagon inscribed in a circle to determine angle measures, using knowledge of properties of regular polygons and the sums of angles in various polygons to help solve the problem. They use...
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Worksheet
Curated OER

Challenge: Skills and Applications Lesson 3.3

For Students 9th - 12th
In this angle measures worksheet, students solve 9 short answer problems. Students find values for x and y given two parallel lines cut by a transversal. Students use alternate interior, supplementary, and exterior angles to find x and y.

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