Question: Please help me with this problem 1- 130. A string around a circle is pulled up by a thumbtack, 7, as shown at right. The

Please help me with this problem

1- 130. A string around a circle is pulled up by a thumbtack, 7, as shown at right. The string is tangent to the circle with following problems. AT=TB. Given that the circle has a radius of r, complete the a. T Find an expression for the length of the string if AT = r. b. How long would the string have to be if AB is 120? C. Find mCATB. B

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