TalkingPencilLearning beyond the school textbook

Tell whether three lengths can make a triangle

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Question 1

Each line is three stick lengths in cm. Which three cannot make a triangle? 11, 11, 13 / 6, 16, 17 / 8, 10, 17 / 6, 7, 14

8, 10, 1711, 11, 136, 16, 176, 7, 14

Question 2

Each line is three stick lengths in cm. Which three cannot make a triangle? 7, 7, 9 / 4, 12, 13 / 6, 8, 13 / 4, 5, 10

7, 7, 94, 12, 134, 5, 106, 8, 13

Question 3

Each line is three stick lengths in cm. Which three cannot make a triangle? 3, 4, 8 / 7, 7, 9 / 3, 9, 10 / 5, 7, 11

5, 7, 117, 7, 93, 4, 83, 9, 10

Five questions on this topic, marked at the end. No hints and no answers along the way — that is what makes the result mean something.