We found 206 resources with the concept proofs
Cyclic Quadrilateral – Proof
2 mins 6th - 12th CCSS: Adaptable
New ReviewWhat do you call a quadrilateral in danger? A peril-lelogram! Scholars avoid danger by proving the opposite angles in a quadrilateral add up to 180 degrees. After viewing a brief video, they complete textbook exercises and a practice...
Angle in a Semi-Circle – Proof
3 mins 6th - 12th CCSS: Adaptable
New ReviewYoung mathematicians observe a geometric proof using a short video. They see each part of the diagram clearly labeled and the simple math written off to the side. The new knowledge helps them solve additional problems independently.
Module 2: Congruence, Construction and Proof
9th - 12th CCSS: Designed
New ReviewConstruct yourself a winning geometry unit. A set of lessons introduces geometry scholars to constructions and proofs with compasses and straightedges. It also covers triangle congruence through transformations. This is the second of...
Proofs: Angle Pairs and Segments—The Three Angle Problem
9th - 11th
Finding the sum of the measures of three angles is easy, unless you have no clue what the measures are. Learners use an interactive diagram to see a geometric problem in a different way. A set of challenge questions takes them through...
How Many Ways Are There to Prove the Pythagorean Theorem?
5 mins 8th - 12th CCSS: Adaptable
There is more than one way to prove the Pythagorean Theorem. Euclid and Einstein found the same way to prove the Pythagorean Theorem. The video introduces several other ways to prove the theorem along with the history of its use.
Parallelogram Proofs: Quadrilaterals that are Parallelograms
6th - 12th
What conditions must be met for a quadrilateral to be a parallelogram? A slider interactive allows individuals to move the vertices of a quadrilateral. They answer questions that prove whether a given quadrilateral is a parallelogram.