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One right angle

Two other unequal angles

No equal sides .

so...

⇒ take base 3cm

mark line segment as a and b

⇒ now a as center measure 90 degrees

⇒a as center draw up to 4 cm then as mark as c

now join c and b

now it is scalene right angled triangle.

ab = 3cm , ac = 4 cm , bc = 5 cm and angle a is 90 degrees

hence Δ abc is scalene right angled triangle.