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OpenStudy (anonymous):
What three lengths could be lengths of the sides of a triangle? A) 9cm, 22cm, 11cm B) 21cm, 7cm, 6cm C) 12cm, 5cm, 17cm or D) 10cm,15cm, 24cm
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OpenStudy (tkhunny):
Pick two sides. Add them. Is the sum greater than the length of the third side? Example: 9, 22, 11 9+22 = 31 > 11 Good 11+22 = 33 > 9 Good 9+11 = 20 < 22 No Good! Okay, move on from that one. That cannot be a triangle.
OpenStudy (anonymous):
oh okay I get it now! Thank you so much!!
OpenStudy (tkhunny):
It's calle the "Triangle Inequality". It is your friend!
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