For an isosceles right angles triangle having each of equal sides ‘a’ , we have
I. Area =
a2
II. Perimeter = (2 +
)a
III. Hypotenuse = 2a
Which of the following is true?
We know that,
Area of triangle = 
= 
= 
Now, Hypotenuse = 
= 
= 
Perimeter = a + a + 
= 2a + 
= a (2 + 
)
∴ I and II are true
Hence, option (c) is correct
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