Triangles | Geometry (all content) | Math | Khan Academy
Learn triangle properties and geometry concepts with free lessons and practice on Khan Academy.
Types of triangles review (article) | Khan Academy
Review ways to classify triangles based on their sides lengths and angles. Practice classifying triangles.
Relationships in triangles and quadrilaterals | Khan Academy
Learn about triangles, their properties, and geometry concepts through interactive lessons and practice exercises.
Triangles | TG Math Class 9 | Khan Academy
Practice Up next for you: Corresponding parts of congruent triangles Get 3 of 4 questions to level up!
Pythagorean theorem | Geometry (all content) | Math | Khan Academy
The Pythagorean theorem describes a special relationship between the sides of a right triangle. Even the ancients knew of this relationship. In this topic, we’ll figure out how to use the Pythagorean …
Angles of a triangle (review) | Geometry (article) | Khan Academy
Review the basics of triangle angles, and then try some practice problems.
Trigonometry | Geometry (all content) | Math | Khan Academy
Triangles are not always right (although they are never wrong), but when they are it opens up an exciting world of possibilities. Not only are right triangles cool in their own right (pun intended), they are the …
Right triangles & trigonometry | Math | Khan Academy
Can you find the length of a missing side of a right triangle? You most likely can: if you are given two side lengths you can use the Pythagorean Theorem to find the third one. But, what if you are only …
Geometry (all content) - Khan Academy
Explore geometry concepts including angles, shapes, transformations, and proofs with Khan Academy's engaging resources.
Right triangles & trigonometry - Math | Khan Academy
Triangles are not always right (although they are never wrong), but when they are it opens up an exciting world of possibilities. Not only are right triangles cool in their own right (pun intended), they are the …