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OpenStudy (anonymous):
giving medal for answer What is the total number of diagonals in an octagon? a. 9 c. 20 b. 5 d. 3
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OpenStudy (anonymous):
i thought 20.?
OpenStudy (anonymous):
20 diagonals...... i have a formula... Number of diagonals= [n(n-3)] /2 n=sides octagon has 8 sides its equals to [8(8-3)] /2 = [8(5)] /2 = 40/2 = 20
OpenStudy (anonymous):
ok thnks just makin sure
OpenStudy (anonymous):
ok
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