Suppose you mark n points on a circle, where n is a whole number greater than 1. The number of segments you can draw that connect these points is
How many segments can you draw if you mark 8 points on the circle?

Question

Suppose you mark n points on a circle, where n is a whole number greater than 1. The number of segments you can draw that connect these points is
How many segments can you draw if you mark 8 points on the circle?

anonymous · Answer

attachment

anonymous · Answer

looks like the appropriate formula is 
$$\frac{1}{2}n^2-\frac{1}{2}n$$

anonymous · Answer

oh they gave you the formula!!

anonymous · Answer

yes

anonymous · Answer

$$\frac{1}{2}\times 8^2-\frac{1}{2}\times 8$$

anonymous · Answer

$$\frac{1}{2}\times 64-4=32-4=28$$

anonymous · Answer

28 segments then..ok thanks for explaining. :) You're so smart!

anonymous · Answer

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