What is the measure of ∠ECA?

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  • DWRead
    Lv 7
    3 years ago
    Favorite Answer

    Chord AC subtends a minor chord of 360°-200° = 160°.

    Angle AEC = 160°

    Angle ECA = (180°-160°)/2 = 10°

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  • 3 years ago

    The last question I answered did not seem to help so I will not waste my time answering this.

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  • ted s
    Lv 7
    3 years ago

    hint : tangent line to a circle is ALWAYS perpendicular to the radius....on the other hand the degree measure of EBC is 10°

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