# Geometric Proof Teacher Resources

Find Geometric Proof lesson plans and worksheets
Showing 118 resources
Lesson Plan
Curated OER

#### Proving Triangles Congruent

For Teachers 10th - 12th
Students examine Triangle Congruency. In this measurement comparison lesson, students use inductive, deductive and analytical thinking skills to prove triangle congruency. Students analyze and record their findings on activity worksheets.
Worksheet
Curated OER

#### Verifying Segment Relationships

For Students 10th
In this verifying segment relationships worksheet, 10th graders solve 3 different proofs by verifying the segment relationship in each. They complete each proof given a specific statements supporting the statement with reasons. Then,...
Worksheet
Curated OER

#### Verifying Segment Relationships

For Students 10th
In this verifying segment relationships instructional activity, 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....
Worksheet
Curated OER

#### Proving Triangles Congruent

For Students 10th
In this proving triangles congruent instructional activity, 10th graders solve 4 different proofs for congruent triangles. First, they mark all congruent parts on each figure, then complete the prove statement and identify the postulate...
Worksheet
Curated OER

#### Identifying Similar Triangles

For Students 10th
In this identifying similar triangles worksheet, 10th graders solve 5 different proofs related to similar triangles. First, they identify the similar triangles in each figure and explain why they are similar, using the information to...
Worksheet
Curated OER

#### Parallelograms

For Students 10th
In this parallelograms worksheet, 10th graders solve 8 different types of problems related to measuring various parallelograms. First, they use the figure, a parallelogram, illustrated at the top to solve each problem. Then, students...
Worksheet
Curated OER

#### Verifying Angle Relationships

For Students 10th
In this angle relationships worksheet, 10th graders solve 8 various problems related to verifying angle relationships. First, they complete each statement if the measure of specific angles are equal to 43 and 56. Then, students write a...
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.Â  The one page...
Worksheet
Curated OER

#### Right Triangles

For Students 10th
For this right triangles worksheet, 10th graders solve 5 problems that relate to different right triangles. First, they find the values of x and y so that each triangle is congruent to the other. Then, students write a two-column proof...
Lesson Plan
Curated OER

#### Proof of Identity

For Teachers 9th - 12th Standards
Students explore trigonometric identities.Â Â  In this Algebra II lesson, students use graphing to verify the reciprocal identities.Â  Using Cabri Jr, students investigate the Pythagorean trigonometric identities and the geometric c proofs...
Lesson Plan
Curated OER

#### Proofs of the Pythagorean Theorem

For Teachers 9th - 12th Standards
Working individually and collaboratively, geometers gain a clear understanding of the Pythagorean theorem. They create, explain, and compare proofs of the theorem. Proofs involve areas of trapezoids, squares, and triangles, congruent...
Lesson Plan
EngageNY

#### Addition and Subtraction Formulas 1

For Teachers 11th - 12th Standards
Show budding mathematicans how to find the sine of pi over 12. The third lesson in a series of 16 introduces the addition and subtraction formulas for trigonometric functions. Class membersÂ derive the formulas using the distance formula...
Lesson Plan
Curated OER

#### History / Introduction of Pythagorean Theorem

For Teachers 7th - 12th
Learners explore Pythagoras and the history behind his theorem. They work together to solve a proof that is embedded in the lesson.
Worksheet
Curated OER

#### Triangles and Congruence

For Students 8th - 10th
Can your class construct triangles and determine congruence? Find out with this well put together worksheet. THey construct triangles to given specifications and identify if they are congruent. There are 3 muti-step problems to solve.
Lesson Plan
Curated OER

#### Fractions and Paper Folding

For Teachers K - 11th
For this fraction lesson, students manipulate paper by folding it to create different shapes and sizes, they explore the concept of fractions, and discuss their observations as a class. This is a great lesson for getting students...
Lesson Plan
Curated OER

#### The Truth About Triangles And Proofs

For Teachers 9th - 12th
Students engage in a lesson that is about the classification of triangles and the mathematical proofs involved in working with them. They work on a variety of problems that are created by the teacher with the focus upon the importance of...
Worksheet
Curated OER

#### Transformations and Congruence

For Students 10th
In this transformations and congruence worksheet, 10th graders solve and complete 5 different types of problems. First, they calculate the length of a line giving their answer in 3 significant figures. Then, students prove that two...
Lesson Plan
Curated OER

#### Pythagorean Theorem Triples

For Teachers 9th - 12th
Students research the concept of the Pythagorean Theorem. In this Pythagorean Theorem lesson plan, students use the Internet to learn about the Pythagorean Theorem. Students construct proofs of the Pythagorean Theorem.
Lesson Plan
Curated OER

#### NON-EUCLIDEAN GEOMETRY.

For Teachers 8th - 9th
Students study relationships between angles, side lengths, perimeters, areas and volumes of similar objects. In this lesson students also create and critique inductive and deductive arguments concerning congruency, similarity and the...
Lesson Plan
Curated OER

#### Exterior and Interior Angles of Triangles

For Teachers 10th
Tenth graders explore the exterior and interior angles of triangles. They use a theorem in order to prove a theorem about all polygons. Students use the theorem and its applications to find the angles of different types of triangles.
Lesson Plan
Curated OER

#### Fractions and Paper Folding

For Teachers 9th - 12th
Students explore the concept of origami. In this origami lesson, students construct picture frames out of paper. Students find the midpoint of the paper and determine the fractional area of the paper as it is folded.
Lesson Plan
Curated OER

#### Fractions

For Teachers 3rd - 5th
Students study fractions. In this art lesson, students fold paper, use origami, making new shapes and discuss the area of the shapes created.