Answer:
23mm
Step-by-step explanation:
[tex]area = \frac{1}{2} bh[/tex]
[tex]184 {mm}^{2} \: = \: \frac{1}{2} \times 16mm \: \times \: b[/tex]
[tex]184 {mm}^{2} = \frac{16}{2} mm \times b[/tex]
[tex]184 {mm}^{2} = \: 8mm \: \times \: b[/tex]
[tex] \frac{184 {mm}^{2} }{8mm} = \: \frac{8mm}{8mm} \times b[/tex]
[tex]b = 23mm[/tex]
hope it helps
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