In figure below, seg PQ is a diameter of a circle with centre O. R is any point on the
circle. seg RS ┴ seg PQ. Prove that, SR is the geometric mean of PS and SQ. [That is,
SR² = PS x SQ]
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Answer:
PQ is Diameter
∠PRQ = 90°
=> ∠P = 90° - ∠Q
RS ⊥ PQ
∠SRQ = 90° - ∠Q = ∠P
∠SRP = 90° - ∠P = ∠Q
in Δ PRS & Δ QRS
∠P = ∠SRQ
∠SRP = ∠Q
∠S = 90°
=> Δ PRS ≈ QRS
=> SR/SQ = PS/SR
=> SR² = PS * SQ
=> SR is the geometric mean of PS and SQ
QED
Proved
Step-by-step explanation:
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