1. Which of the following measures can form a triangle? (b) 3 cn (a) 7 cm, 10 cm, 7 cm (c) 8 cm, 9 cm, 11 cm (d) 2 cn
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Answer:
option b because triangle only 3 sides
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Answer:
An isosceles triangle has two sides that are the same length, so the answer is already narrowed down to either 3 cm or 7 cm. Moreover, the sum of any two sides of a triangle added together has to be greater than the third side.
If you were to guess that the unknown side was 3 cm, you could not form a triangle because 3+3<7. This means that the third side would be 7 cm long.
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