GANITA MANJARI · GRADE 9 · PART I · CHAPTER 6

★ An annulus from a chord

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Textbook connection: End-of-Chapter · ★ Q23 · Fig. 6.51 · printed page 152

A chord of the outer circle is tangent to the inner circle. Express the annulus area in terms of the chord length l.

Concentric circles and chord BC tangent at A. AIMS redrawing; use marked relationships, not screen measurements.

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