Which three lengths could be the lengths of the sides of a triangle? A.21 cm, 7 cm, 7 cm B.9 cm, 14 cm, 22 cm C.15 cm, 5 cm, 20
1 answer:
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Answer:
inches
Step-by-step explanation:
a^2+b^2=c^2
10^2+20^2=c^2
100+400=c^2
c^2=500
A. Judy made a mistake between Steps 1 and 2
To factor
, you have to factor it as 
, not 
, because that will leave an extra 6x because of 8x - 2x.
To factor