Simple geometry

Geometry Level 4

Let \(PQ\) and \(RS\) be tangents at the extremities of diameter \(PR\) of a circle of radius \(r\). If \(PS\) and \(RQ\) intersect at some point on the circumference of the circle, then what is the diameter of the circle?

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Simple geometry

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100 Day Summer Challenge

Simple geometry

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, conceptual quizzes.

Our wiki is made for math and science

Master advanced concepts through explanations, examples, and problems from the community.

Used and loved by 4 million people

Learn from a vibrant community of students and enthusiasts, including olympiad champions, researchers, and professionals.

Master advanced concepts through explanations,
examples, and problems from the community.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

Master advanced concepts through explanations,
examples, and problems from the community.

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.