1.

Which of the following can be the sides of a right triangle?(i) 2.5 cm, 6.5 cm, 6 cm(ii) 2 cm, 2 cm, 5 cm(iii) 1.5 cm, 2 cm, 2.5 cmIn the case of right-angled triangles, identify the right angles.

Answer»

I) as you can see 2.5^2+6^2=6.5^2
L.h.s=2.5^2+6^2
= 6.25+36
=42.25
=6.5^2=r.h.s
THEREFORE right ANGLE triangle
2) 2^2+2^2=8 and 5^2=25
They are not EQUAL, therefore not right angle triangle
3) 1.5^2+2^2=2.25+4
=6.25
=2.5^2
Therefore it is a right angle triangle


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