High school geometry
Explore circle properties, calculate circumference and area, and understand real-world applications, enhancing problem-solving skills and mathematical reasoning through engaging high school geometry concepts.
200+ videos and assessments
Standards aligned
Vetted by experts
VIDEOS
VIDEOS
VIDEOS
VIDEOS

Radians as ratio of arc length to radius
Khan Academy
•7th - 12th Grade
•10 Qs

Intro to radians
Khan Academy
•6th - 12th Grade
•10 Qs

Radians & degrees
Khan Academy
•8th - 12th Grade
•10 Qs

Degrees to radians
Khan Academy
•7th - 10th Grade
•10 Qs

Radians to degrees
Khan Academy
•8th - 12th Grade
•10 Qs
VIDEOS
VIDEOS
VIDEOS

Proof: Right triangles inscribed in circles
Khan Academy
•8th - 12th Grade
•10 Qs

Inscribed quadrilaterals proof
Khan Academy
•9th - 12th Grade
•10 Qs

Proof: radius is perpendicular to a chord it bisects
Khan Academy
•8th - 10th Grade
•10 Qs

Proof: perpendicular radius bisects chord
Khan Academy
•8th - 10th Grade
•10 Qs
VIDEOS

Tangents of circles problem (example 1)
Khan Academy
•8th - 10th Grade
•10 Qs

Proof: Radius is perpendicular to tangent line
Khan Academy
•8th - 10th Grade
•5 Qs

Proof: Segments tangent to circle from outside point are congruent
Khan Academy
•8th - 10th Grade
•10 Qs

Tangents of circles problem (example 2)
Khan Academy
•9th - 10th Grade
•10 Qs

Tangents of circles problem (example 3)
Khan Academy
•6th - 10th Grade
•10 Qs