Question 19
Find the radius of the shaded circle below: (Answer: 2/3)
Editorial note: The source includes its answer in the question; it is preserved. Read the figure as two equal white circles of diameter 2 tangent to each other and to the outer circle of diameter 4, with the shaded circle tangent to all three. These geometric relations are indicated by the drawing rather than stated in words.
Editorial note: The source includes its answer in the question; it is preserved. Read the figure as two equal white circles of diameter 2 tangent to each other and to the outer circle of diameter 4, with the shaded circle tangent to all three. These geometric relations are indicated by the drawing rather than stated in words.