Measure the sides of the adjacent triangle and verify:

 

$\mathrm{AB}+\mathrm{BC}>\mathrm{CA}$

Measure the sides of the adjacent triangle and verify:

$\mathrm{BC}+\mathrm{CA}>\mathrm{AB}$

Measure the sides of the adjacent triangle and verify:

$CA+AB>BC$

In the following pair of angles, say which angles is greater without measuring it. Which method have you applied?

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