Question

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Answer 1

Answer: 3 is a right angled triangle

Step-by-step explanation:In a right angle triangle the square of hypotenuse is equal to sum of square of its other two side .

Therefore:-

1} (10)^2 = (6)^2 + (8)^2

= it is not a right angled triangle.

2}  (24.515)^2  = (15)^2 + (20)^2

= it is not a right angled triangle.

3} (25)^2 = (20)^2 + (15)^2

= it is a right angled triangle.

4}(26.907)^2 = (18)^2 + (20)^2

= it is not a right angled triangle.

Answer 2

Answer:

1st and 2nd don't give right angles.to verify use big copies,scale and compass with pencil

2nd because to connect between 24 and 25 cm is correct but remaining line length is more then 5 cm