Question

An isosceles triangle has a base 10 units long. If the congruent sides have whole number measures, what is the least possible length of the sides?

A. 5
B. 6
C. 17
D. 21

I know the answer is B, but I don't know why. Please explain, thanks!

Answer 1

If you add up the lengths of any two sides of a triangle... it must be greater than the length of the other side.

Answer 2

6+6= 12 > 10? Why is the answer 6?

Answer 3

?

Answer 4

if you have a triangle, any triangle, the sum of 2 sides, is greater than the length of the 3rd side. here, we already know that the triangle is isosceles so that eliminates 5 because 5+5=10, but that is equal to the length of the 3rd side... not greater...the sum of the rest of the options will all be greater than 10, but which one has the least sum... 6+6... hence the least possible length is 6

Answer 5

What? I don't understand. Shouldn't the least possible length be 5 because 5+5 is not greater than 10?

Answer 6

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Answer 7

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Answer 8

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Answer 9

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Answer 10

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