Respuesta :

A. 34 times 21 divided by 2 is 357. area of a triangle is base times height divided by 2.

Answer:

[tex]357=x \cdot 34 \cdot \frac{1}{2}[/tex]

[tex]357=17x[/tex]

[tex]x=\frac{357}{17} =21[/tex]