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britbrat4601
Group Title
Which three lengths could be the lengths of the sides of a triangle?
A. 12 cm, 5 cm, 17 cm
B. 10 cm, 15 cm, 24 cm
C. 9 cm, 22 cm, 11 cm
D. 21 cm, 7 cm, 6 cm
 one year ago
 one year ago
britbrat4601 Group Title
Which three lengths could be the lengths of the sides of a triangle? A. 12 cm, 5 cm, 17 cm B. 10 cm, 15 cm, 24 cm C. 9 cm, 22 cm, 11 cm D. 21 cm, 7 cm, 6 cm
 one year ago
 one year ago

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geoffb Group TitleBest ResponseYou've already chosen the best response.5
Remember that the sum of the two shorter legs have to be greater than the longest leg. If they sum to less, they can't even touch. If they sum to the same, they are on the same line as the long leg, and it is not a triangle.
 one year ago

britbrat4601 Group TitleBest ResponseYou've already chosen the best response.0
so b?
 one year ago

britbrat4601 Group TitleBest ResponseYou've already chosen the best response.0
thanks for your help!
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.5
A would just be a line, and C and D could not connect to form a triangle.
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.5
No problem. :)
 one year ago

vitorfleite Group TitleBest ResponseYou've already chosen the best response.0
Everyone can be a triangle, scalene triangles.
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.5
@vitorfleite No they can't. Draw them out on a piece of paper and you'll see.
 one year ago

vitorfleite Group TitleBest ResponseYou've already chosen the best response.0
I draw a triangle with the lenghts of C, now.
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.5
dw:1353900288402:dw You can't make the 12 and 5 cm lines into a triangle. The only way they can connect is as a straight line.
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.5
dw:1353900366005:dw The two shorter lines cannot connect.
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.5
In C and D, the shorter lines don't even add up to the big line. It's not mathematically possible for two short lines to create a triangle with a long line unless the two short lines sum to greater than the long line.
 one year ago

vitorfleite Group TitleBest ResponseYou've already chosen the best response.0
I understood now, I did wronggg.
 one year ago

geoffb Group TitleBest ResponseYou've already chosen the best response.5
No worries. I made the exact same false assumption on here a few months ago. :)
 one year ago
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