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March 30, 2017

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ABCD is a rectangle. On line segment AB, E is a point such that ∠ADE=17∘ and ∠BCE=29∘. What is the measure of ∠DEC (in degrees)?

  • geometry - ,

    ∠ADE = 90-17 = 73°
    ∠ECD = ∠CEB = 29°
    ∠DEC = 180 - (73+29) = 78°

  • geometry - ,

    # 5 from HW
    Given: x is the midpoint AY, and Y is the midpoint of XB.
    Prove: AX YB
    Satements
    A
    XY
    Reasons
    B
    1.
    2.
    3.

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