But in my dig angle b=90. my co-ordinated were in the wrong places so my answer was wrong.

my working was like this: (as per the 1st dig)

AB=\(\sqrt{}25 = 5\)

BC =\(\sqrt{}50 =5\sqrt{}2\)

AC= \(\sqrt{}25 = 5\)

using pythagoram theorm, AC²=AB²+BC²

5=5²+\(5\sqrt{}2\)²

5 not = 25+50

But as per Alan's dig:

AB=\(\sqrt{}25 = 5\)

BC =\(\sqrt{}25 = 5\)

AC=\(\sqrt{}50 =5\sqrt{}2\)

using pythagoram theorm, AC²=AB²+BC²

\(5\sqrt{}2\)²=5²+5²

50=25+25=50