# Geometric Proof Teacher Resources

Find Geometric Proof lesson plans and worksheets
Showing 145 - 152 of 152 resources
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#### 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.
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#### Using Triangle Congruence Theorems-ID: 9692

For Teachers 10th
Tenth graders explore triangle congruence.  In this geometry lesson, 10th graders solve situational problems using their prior knowledge regarding triangle congruence.  Additionally, students explore and conjecture regarding properties...
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#### The Truth About Triangles And Proofs

For Teachers 9th - 12th
Learners engage in a instructional activity 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...
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#### Geometry and Measurement

For Teachers 10th
Tenth graders review geometric concepts and apply theorems to solve problems. In this geometry lesson, 10th graders solve triangular problems using triangles properties, practice solving polygon problems and writing proofs. They compare...
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#### Angles Formed by Chords

For Teachers 10th
Tenth graders investigate angles and arcs in circles.  In this geometry lesson, 10th graders explore the relationship between the intersecting chords of a circle and the intercepted arcs.  The lesson makes use of a dynamic geometry...
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#### 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.
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#### Fractions and Paper Folding

For Teachers 9th - 12th
Learners explore the concept of origami. In this origami lesson, students construct picture frames out of paper. Learners find the midpoint of the paper and determine the fractional area of the paper as it is folded.
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#### Pythagorean's Theorem

For Teachers 9th - 12th
Students listen to a short lecture about Pythagoras-who he was, his contributions, where he was from, and a timeline involving him. They have the option of doing some research about Greek mathematicians on their own and summarize their...