geometry

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a person is standing 12m away from a street light that is 9m tall. How tall is he if his shadow is 3m long?

  • geometry -

    Let h be the height

    Using similar triangles,

    h/9 = 3/15 = 1/5
    h = 9/5 = 1.8m

  • geometry -

    If the measure of ÐDAB = 50°, and ÐDAC = 20°, what is ÐCAB?

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