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One of the hardest topics to teach in Geometry has to be congruent triangle proofs. Identifying properties and theorems in order to develop and reason thr

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Unit 2: Reasoning & Proofs ~ Teaching Two-Column Proofs in High School Geometry

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Activities for congruent triangle proofs in geometry

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Algebraic Proofs Task Cards - use as an intro to proofs in geometry

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### Postulates, Corollaries, & Theorems List ~ High School Geometry

This 21 page High School Geometry Theorems Postulates & Corollaries List would be perfect to help my math students understand all the difficult Geometry concepts! There are over 120 different Theorems in here! Its so thorough. I love how the Theorems all have a diagram and explanation next to them to help put them in "student words". This would be especially helpful when we learn proofs and all those pesky circle theorems. Love Love Love!

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Do you need some help with geometry proofs? On this animated geometry lesson, we explore different strategies for thinking about and completing geometry proofs. This lesson is aligned with the common core standards for Geometry and was designed with flipped classroom teachers and visual learners in mind! Check out our ever-growing library of lessons and subscribe to our YouTube channel!

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### Introductory Geometry Proofs Cut and Paste Activity

In this activity students will cut strips of paper and assemble them into two-column proofs. The first two proofs are algebraic proofs, the third proof uses the segment addition postulate, and the fourth proof uses the definition of congruence. A "Hints Sheet" is included for struggling students.

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### Postulates, Corollaries, & Theorems List ~ High School Geometry

I used this Theorems list with my High School Geometry students last year and we loved it! It really helped them with all the different Geometry concepts and was especially helpful for doing proofs! They kept it in their note section of their interactive notebook and were always referencing it for help on their homework. Every Geometry teacher needs this!!!

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