# Question of the Day

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http://sat.collegeboard.org/practice/sat-question-of-the-day
Oct
10
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Mathematics > Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer.

In the figure above, the circle with center and the circle with center are tangent at point . If the circles each have radius , and if line is tangent to the circle with center at point , what is the value of ?

Want a hint?

The measure of is because a line tangent to a circle is perpendicular to the radius of the circle that contains the point of tangency. This means that is a right triangle.

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