Brian McLogan
Master writing a two column algebraic proof
Master writing a two column algebraic proof
Khan Academy
Triangle Medians and Centroids, Special Properties and Parts of Triangles, Geometry
This video discusses the terminology used in geometry, including words like centroid and median. Through this lecture, young mathematicians can see a visual representation of both median and centroid. Also, a proof showing how to...
Khan Academy
Area of Inscribed Equilateral Triangle (Some Basic Trig Used)
Delving into basic trigonometry, this resource shows how to find the area of an inscribed equilateral triangle. Using a high-level problem, HeronÕs theorem is used to find the area of a figure. Before SAT testing, use this as a review.
Khan Academy
Area of Diagonal Generated Triangles of Rectangle Are Equal, Geometry
This lecture explores finding the area of each of the triangles created by drawing two diagonal lines through a rectangle. It provides a detailed explanation of how to use a formula to solve the given problem. Tip: Use this for test...
Khan Academy
Triangle Medians and Centroids, Special Properties and Parts of Triangles, Geometry
This video discusses the terminology used in geometry, including words such as centroid and median. Through this lecture, young mathematicians can see a visual representation of both. The video also demonstrates how to calculate medians.
Khan Academy
Triangle Medians and Centroids (2D Proof), Geometry
In the first part of this series, the instructor addressed the terminology used with medians and centroids of triangles and then showed how to solve this type of problem. He illustrated the concepts using a high-level problem, likely...
Khan Academy
Rhombus Diagonals, Quadrilaterals, Geometry
Delving into proof that the diagonals of a rhombus are perpendicular to each other, this lecture evaluates the angles and sides of this figure. It would serve as a great test preparation activity.
Khan Academy
Area of Diagonal Generated Triangles of Rectangle are Equal, Geometry
This lecture explores the area of each triangle created by drawing two diagonal lines through a rectangle. It provides a detailed explanation of how to use a formula to solve the given problem. Tip: Use this for test preparation purposes.
Flipped Math
Prove Triangles Similar
Show more than one way to prove similarity. Scholars learn three different methods to show two triangles are similar, Angle-Angle, Side-Side-Side, and Side-Angle-Side. Pupils practice applying these methods to determine whether two given...
Flipped Math
Parallel Lines and Triangles
Triangles bring sums to geometry. The lesson presents two theorems dealing with the angles of a triangle. Pupils learn about the Triangle Sum Theorem and the Exterior Angle Theorem, and then apply the theorems to create equations and...
Flipped Math
Unit 2 Review: Reasoning and Proofs
The proof is in the review. Individuals watch a short review of the content from the unit to prepare for the unit exam. The review covers inductive reasoning, conditional and related statements, and two-column algebraic and geometric...
Flipped Math
More with Proofs
Proofs may be as easy as 1, 2, 3 ... maybe. Pupils participate in creating four example proofs. The presentation uses a list of geometric properties to develop the proofs by filling in both the statements and reasons. Scholars practice...
Flipped Math
Intro to Proofs
Prove the best way to keep up in Geometry. Scholars first review algebraic properties from Algebra. Learners then use the properties to create two-column proofs to solve linear equations before completing algebraic proofs by providing...
CK-12 Foundation
Two-Column Proofs: Lesson
Why is it a two-column proof? A video introduces the class to the concept of a two-column proof and how to set one up. The segment of a playlist on basic geometry highlights the types of reasons that can be in a proof.