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- Types of triangles review (article) | Khan Academy
Review ways to classify triangles based on their sides lengths and angles Practice classifying triangles
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- Classifying triangles (video) | Khan Academy
The video explores how triangles are classified based on their sides and angles It introduces the terms scalene, isosceles, and equilateral for side lengths, and acute, right, and obtuse for angles It emphasizes that triangles can be categorized in multiple ways based on these characteristics
- Classify triangles by both sides and angles - Khan Academy
Practice cross-classifying triangles by both their sides and angles
- Intro to inverse trig functions (article) | Khan Academy
Learn about arcsine, arccosine, and arctangent, and how they can be used to solve for a missing angle in right triangles
- What are altitudes of triangle (video) | Khan Academy
In this video we discuss what is an altitude of a triangle and how we can draw identitfy different altitudes of the triangle Created by Devashish Phadnis
- Special right triangles intro (part 1) (video) | Khan Academy
A 45-45-90 triangle is a special type of right triangle, where the ratio of the lengths of the sides of a 45-45-90 triangle is always 1:1:√2, meaning that if one leg is x units long, then the other leg is also x units long, and the hypotenuse is x√2 units long
- Geometry (all content) - Khan Academy
Explore geometry concepts including angles, shapes, transformations, and proofs with Khan Academy's engaging resources
- Isosceles equilateral triangles problems - Khan Academy
Isosceles triangles have two congruent sides and two congruent base angles Equilateral triangles have all side lengths equal and all angle measures equal We use these properties to find missing angles in composite figures The problems are partly from Art of Problem Solving, by Richard Rusczyk
- Solving for a side in right triangles with trigonometry
Sal is given a right triangle with an acute angle of 65° and a leg of 5 units, and he uses trigonometry to find the two missing sides
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