A man called January is a clumsy handyman (like Baptiste), so one day he wants to make a right-angled triangle table. With his ruler he measures two sides of a piece of wood, but then his ruler breaks. Therefore he tries to measure the angles with a protractor; but after measuring the first angle his protractor breaks too (he has very bad luck).
With the measures help Mr. January to verify if his table is a right-angled triangle.
Mr. January knows that:
- CB = 50 cm
- AB = 60 cm
- CBA = 39°
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