Answer:
a.
[tex]h=\dfrac{2A}{b}[/tex]
b.
A = 220 mm²
b = 20 mm
[tex]h=\dfrac{2 \cdot 220}{20}=22 \: {mm}[/tex]
A=1/2bh
2*A=1/2bh*2
2A/b=bh/b
h=2A/b
b)h=2(220)/20
height=22mm
Step-by-step explanation:
