Which side lengths could be used to form a triangle?
2 cm, 3 cm, 12 cm
15 cm, 7 cm, 5 cm
14 cm, 20 cm, 32 cm
10 cm, 25 cm, 15 cm

If you take the three sides of a triangle and add them in pairs, the sum is greater than (not equal to) the third side. If that is not true, then it is not possible to construct a triangle with the given side lengths. Example: Determine if sides of length 5 cm, 8 cm and 12 cm can form a triangle?

Answer: b 2 = 1.

step-by-step explanation: given equation a = h(b 1+b 2)

also we are given values of a, h and b 1 as :

a = 16, h = 4, and b 1 = 3.

in order to solve it for b 2, we need to plug the given values of   a, h and b 1 .

therefore, plugging values of   a, h and b 1   in given equation, we get

16 = 4( 3 + b 2)

first dividing both sides by 4, we get

4 = 3 + b 2

subtracting 3 from both sides, we get

4 -3 = 3 -3 + b 2

1 = b 2.

therefore, b 2= 1.

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