How many chords are determined by joining dots on a circle if there are the following number of dots? a. 4 dots b. 10 dots c. 98 dots d. n dots a. When there are 4 dots there are 6 chords. b. When there are 10 dots there are chords. c. When there are 98 dots there are chords. d. When there are n dots there are $\frac{n(n-1)}{2}$ chords.
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Step 1: We are given the formula for the number of chords when there are n dots: $\frac{n(n-1)}{2}$. Show more…
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