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Mathematics
Problem
Benjamin has completed this question. Can you spot any mistakes?
a
2
+
b
2
=
c
2
12
2
+
16
2
=
x
2
144
+
256
=
x
2
400
=
x
2
x
2
=
400
x
=
200
cm
\begin{aligned} a^2 + b^2 &= c^2 \\ 12^2 + 16^2 &= x^2 \\ 144 + 256 &= x^2 \\ 400 &= x^2 \\ x^2 &= 400 \\ x &= 200\text{cm} \end{aligned}
a
2
+
b
2
1
2
2
+
1
6
2
144
+
256
400
x
2
x
=
c
2
=
x
2
=
x
2
=
x
2
=
400
=
200
cm
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