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Interactive
Curated OER

Geometry

For Students 9th - 10th
For this geometry worksheet, learners identify the different shapes created by nets. They also identify the intersection of lines and planes. There are 5 questions with an answer key.
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Lesson Plan
EngageNY

The Inscribed Angle Alternate – A Tangent Angle

For Teachers 9th - 12th Standards
You know the Inscribed Angle Theorem and you know about tangent lines; now let's consider them together! Learners first explore angle measures when one of the rays of the angle is a tangent to a circle. They then apply their newfound...
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Assessment
Charleston School District

Review Unit 8: Geometry Applicaitons

For Students 8th - 10th Standards
Pupils complete a review worksheet that highlights the key problems from the first eight lessons in the series. Topics include the Pythagorean Theorem and its converse, as well as finding volume of three-dimensional figures.
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Worksheet
Curated OER

Circle Proofs

For Students 10th
In this circle proofs activity, 10th graders complete 4 different problems that include circle proofs. They respond to each of the questions that deal with circle proofs. Then, students read the given information and use the circle...
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Worksheet
Curated OER

Verifying Segment Relationships

For Students 10th
In this verifying segment relationships learning exercise, 10th graders solve two proofs by following the same format used in algebra. They complete each of two proofs by naming the property that justifies each statement given. Students...
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Worksheet
Curated OER

Using Properties Homework

For Students 10th
In this geometry worksheet, 10th graders determine the property of the real number system that justifies each given statement and complete a two column proof in which they justifying the steps for solving an equation.  The one page...
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Worksheet
Curated OER

Easy Worksheet: Congruent Segments

For Students 9th - 12th
In this congruent segments worksheet, high schoolers solve 6 short answer problems. Students justify steps in a proof by identifying the reason for various steps. High schoolers justify steps of proofs using the transitive property,...
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Worksheet
Curated OER

Chapter 4.5 Geometry Practice Problems

For Students 10th - 11th
In this geometry practice problems worksheet, students write geometric proofs to prove the validity of given circumstances. Students prove parallel lines, perpendicular lines, and similar angles. This four-page worksheet contains eight...
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Worksheet
Curated OER

Proofs Involving Congruent Angles

For Students 11th - 12th
For this congruent triangle worksheet, learners write proofs to support characteristics of congruent triangles. This one-page worksheet contains ten problems.
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Worksheet
Curated OER

Geometry: Angles

For Students 11th - 12th
In this angle learning exercise, students find the value for a given variable. They use similar figures, alternate interior angles, side angle side, and other geometric theorems and proofs to determine the value of the given variable....
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Worksheet
Curated OER

Geometry Concepts and Applications

For Students 10th
In this concepts and applications review worksheet, 10th graders solve and complete 40 various types of multiple choice problems. First, they write the equation of a vertical line passing through a point. Then, students find the...
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Worksheet
Curated OER

Proofs with Triangles

For Students 9th - 12th
In this geometry worksheet, high schoolers prove triangle congruence by making statements with reasons and concluding with the AAS or HL theorem. There are 2 proofs.
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Lesson Plan
EngageNY

Criterion for Perpendicularity

For Students 9th - 12th Standards
The Pythagorean Theorem is a geometry pupil's best friend! Learners explain the equation a1b1 + a2b2 = 0 for perpendicular segments using the Pythagorean Theorem. They are able to identify perpendicular segments using their endpoints and...
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Lesson Plan
Virginia Department of Education

Pythagorean Theorem

For Students 8th Standards
Investigate the meaning of the Pythagorean Theorem through modeling. After comparing the area of the square of each side, individuals cut triangles and squares to facilitate the comparison.
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Worksheet
Curated OER

Why do Stars Rise in the East?

For Students 8th - 10th
In this stars rise in the east activity, learners use geometry to show how the Earth rotates from west to east and why celestial bodies appear to rise in the east and set in the west. Students draw a figure and label given points in...
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Worksheet
Curated OER

Geometry Practice: Loci and Transformations

For Students 9th - 12th
This resource guides young geometers to create new polygons from others of equal area, compare an image to its reflection and find errors, conduct repeated reflections, map translations, and determine center of rotation. No solutions are...
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Instructional Video3:53
Corbett Maths

Coordinates and Shapes

For Students 6th - 11th Standards
Where is the point? Given three points on the coordinate plane, the video walks through the steps to find the location of the fourth point to create a given special quadrilateral. The narrator first determines the coordinates of the...
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Worksheet
Curated OER

Right Triangle congruence

For Students 9th - 10th
Learners will determine if two triangles are congruent and which property is used. In this lesson on right triangles, students will determine what additional information is need to make a pair of triangles congruent.
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Lesson Plan
Curated OER

Volume of a prism

For Teachers 10th
For this geometry worksheet, 10th graders determine the volume of various prisms.  The one page worksheet contains two problems.  Answers are not included. 
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Lesson Plan
EngageNY

Law of Sines

For Teachers 11th - 12th Standards
Prove the Law of Sines two ways. The ninth segment in a series of 16 introduces the Law of Sines to help the class find lengths of sides in oblique triangles. Pupils develop a proof of the Law of Sines by drawing an altitude and a second...
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Lesson Plan
EngageNY

The Converse of the Pythagorean Theorem

For Teachers 8th Standards
Is it a right triangle or not? Introduce scholars to the converse of the Pythagorean Theorem with a lesson that also provides a proof by contradiction of the converse. Pupils use the converse to determine whether triangles with given...
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Workbook
Curated OER

Word Problem Practice Workbook

For Students 6th - 8th Standards
Need worksheets that challenge your middle schoolers to apply their understanding of math? Problem solved! From integers, fractions, and percents, to algebra, geometry, and probability, over 100 pages of word problem worksheets are...
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Worksheet
Curated OER

Solving Equations

For Students 9th
In this Algebra I worksheet, 9th graders solve basic equations, writng a proof of the solution and justifying each step. The one page worksheet contains four questions. Answers are not included.
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Worksheet
Curated OER

Triangle worksheets

For Students 10th
In this geometry worksheet, 10th graders explore triangle properties, including the sum of the measures of the angles of a triangle, the triangle inequalities, properties of isosceles triangles, properties of congruent triangles, and...

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