The Parallel Tangents Right Angle Challenge

CirclesVideo challenge · SAV30

The Parallel Tangents Right Angle Challenge

CBSE Class 10 · Solve it one decision at a time. A wrong pick earns a nudge, never the answer.

Step 1 of 4

The problem

In a circle with centre OO, XYXY and X′Y′X'Y' are two parallel tangents touching the circle at PP and QQ. Another tangent ABAB, touching the circle at CC, meets XYXY at AA and X′Y′X'Y' at BB. Find ∠AOB\angle AOB.

Step 1 · Your move

Before the guided steps, what did you get for ∠AOB\angle AOB?

X'Y'OPQCABXY
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