Curated and Reviewed by
Reasons for Geometric Statement/Reason Proofs
Stuck trying to remember the formal language of a geometric proof? Never fear, this handout has them all ready to go. The reasons are sectioned by topic so this handy guide is ready when you are to tackle those two column proofs.
36 Views 30 Downloads CCSS: Adaptable
- Post online as a reference sheet
- Lists, but does not explain the reasons
- This resource is only available on an unencrypted HTTP website. It should be fine for general use, but don’t use it to share any personally identifiable information
- Neatly organized resource
- Folder Types
- Activities & Projects
- Graphics & Images
- Handouts & References
- Lab Resources
- Learning Games
- Lesson Plans
- Primary Sources
- Printables & Templates
- Professional Documents
- PD Courses
- Study Guides
- Performance Tasks
- Graphic Organizers
- Writing Prompts
- Constructed Response Items
- AP Test Preps
- Lesson Planet Articles
- Interactive Whiteboards
- Home Letters
- Unknown Types
- All Resource Types
- Show All
See similar resources:
Vertical Angles Proof SamplesLesson Planet
This visual, manipulative-based format for teaching geometric proofs nicely scafolds learners' development of mathematical reasoning and proof skills. This sample represents a proof of the congruence of vertical angles in four formats;...
7th - 10th Math CCSS: Designed
Triangle Congruency Proofs (part 1)EngageNY
Can they put it all together? Ninth graders apply what they know about proofs and triangle congruence to complete these proofs. These proofs go beyond the basic triangle congruence proofs and use various properties, theorems, and...
9th - 10th Math CCSS: Designed
Informal Proofs of Properties of DilationsEngageNY
Challenge the class to prove that the dilation properties always hold. The lesson develops an informal proof of the properties of dilations through a discussion. Two of the proofs are verified with each class member performing the...
8th Math CCSS: Designed
Angles in the Same Segment – ProofLesson Planet
If angles intercept the same arc, the angles must be the same size. The quick video talks through the proof of showing the reason two inscribed angles that intersect the same arc have the same measurement. Pupils then create their own...
1 min 8th - 12th Math CCSS: Adaptable
Inductive ReasoningLesson Planet
Learners use inductive reasoning every day but might not realize it. An instructive video demonstrates that the process of inductive reasoning means searching for and identifying patterns. The instructor begins with numeric examples and...
4 mins 9th - 12th Math CCSS: Adaptable