tewodrosbelay2004 tewodrosbelay2004

27-02-2024
Mathematics

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cross-section of a parabolic reflector is shown in the figure below. A bulb is located at the focus and the opening at the focus, AB, is 12 cm. What is the diameter of the opening, CD, 8 cm from the vertex? D B C A 8cm V 6cm

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