Question

guys plz help me in this
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Answer 1

Step-by-step explanation:

$ab = bc = x \\ ab {}^{2} + bc {}^{2} = ac { }^{2} \\ x {}^{2} + {x}^{2} = { \sqrt{8} }^{2} \\ 2 {x}^{2} = 8 \\ {x}^{2} = 4 \\ x = 2 \\ ab = bc = 2cm$

$angle \: abc = 90 \\ angle \: acb = angle \: bac \: = x \\ x + x + 90 = 180 \\ 2x + 90 = 180 \\ 2x = 90 \\ x = 45 \\ angle \: bac = 45$

Answer 2

Step-by-step explanation:

in triangleABC,

<B=90°,AC=root8 AB=AC, <A=<C=45°

AB=BC=1/ root2×AC

=1 /root2 × root8

=1/root2 × 2root2

=2

AB=2 BC=2

<BAC=45°

AB=BC=1/root2×AC

=1/root2×root8

1/root2× 2root2

=2