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Khan Academy
SAT Prep: Test 8 Section 2 Part 4
Advising students to become comfortable with the 30-60-90 triangles as an SAT prep skill, Sal finishes this review session with a geometry problem, an algebra problem with fractions, slopes, and median numbers. His tips and test-taking...
Khan Academy
Khan Academy: Geometry: Ca Geometry: Circle Area Chords Tangent
Demonstrates solutions to problems #71-75 of California Geometry released state test questions. Problems address Pythagorean theorem, 45-45-90 triangles, 30-60-90 triangles, circumscribed polygons, area, chord length, tangents to circles...
Khan Academy
Khan Academy: Geometry: Ca Geometry: More Trig
The video tutorial [12:21] demonstrates solutions to problems #66-70 of California Geometry released state test questions. Problems address basic trigonometry ratios, 30-60-90 triangles.
Khan Academy
Khan Academy: Triangles: Intro to 30 60 90 Triangles
Explains the special relationship of the lengths of the sides of a 30-60-90 triangle using the Pythagorean theorem.
Khan Academy
Khan Academy: Triangles: 30 60 90 Triangle Side Ratios Proof
This video explores proving the ratios between the sides of a 30-60-90 triangle.
Sophia Learning
Sophia: Special Right Triangles
Special right triangles are investigated in this video tutorial. The lesson provides background knowledge and two videos that show the relationships of the sides in special right triangles and practice problems to test students'...
Sophia Learning
Sophia: Special Right Triangles
Special right triangles are explored in this video tutorial. The lesson provides four videos that explain the side ratios for 45-45-90 and 30-60-90 triangles along with real-world examples involving each type of triangle.
Sophia Learning
Sophia: Properties of Equilateral Triangles
Equilateral triangles are explored in this learning tutorial, which includes several videos [4:18; 4:18; 3:18] and a PowerPoint presentation. The lesson includes an introduction of equilateral triangles and their key characteristics....
Khan Academy
Khan Academy: Geometry: Circle Area Chords Tangent
This video [10:06] contains touches the following topics: Pythagorean theorem, 45-45-90 triangles, 30-60-90 triangles, circumscribed polygons, area, chord length and tangents to circles.