High school geometry
Explore right triangles and trigonometry by mastering Pythagorean theorem, trigonometric ratios, and solving real-world problems involving angles and lengths in geometric contexts.
200+ videos and assessments
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VIDEOS
VIDEOS

Garfield's proof of the Pythagorean theorem
Khan Academy
•6th - 10th Grade
•10 Qs

Another Pythagorean theorem proof
Khan Academy
•8th - 12th Grade
•10 Qs

Pythagorean theorem proof using similarity
Khan Academy
•6th - 10th Grade
•10 Qs

Bhaskara's proof of the Pythagorean theorem
Khan Academy
•6th - 8th Grade
•10 Qs
VIDEOS
VIDEOS
VIDEOS

Trig word problem: complementary angles
Khan Academy
•7th - 12th Grade
•10 Qs

Using complementary angles
Khan Academy
•7th - 10th Grade
•10 Qs

Sine & cosine of complementary angles
Khan Academy
•7th - 12th Grade
•10 Qs

Trig challenge problem: trig values & side ratios
Khan Academy
•8th - 12th Grade
•10 Qs