1.

If triangle ABC ,AB=5,BC=12,AC=13cm, then angle B is? ​

Answer»

ANSWER:

ANSWER

In △ABC

(AB)

2

+(BC)

2

=(5)

2

+(12)

2

=25+144=169

(AC)

2

=13

2

=169

AB

2

+BC

2

=AC

2

By CONVERSE of Pythagoras theorem

△ABC is right ANGLE triangle, in which

∠B=90

o



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