13. Given: Circle B with Tangent AD and Tangent DC, measure of Arc AC = 55° a. ABCD is a quadrilateral. What is the sum of the interior angles .of a quadrilateral? b. Tangent AD and Radius AB form a angle c. Tangent DC and Radius BC form a angle d. What is the sum of Angles BAD and DCB? e. What must be the sum of Angles ABC and ADC equal? f. Write an equation that shows the relationship between mzABC and mzADC?

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