a)
[tex] \frac{a \times h}{2} = \frac{4 \times 4}{2} = 8[/tex]
b)
[tex] \frac{e \times f}{2} = \frac{6 \times 6}{2} = 18[/tex]
c)
[tex] \frac{(a + b) \times h}{2} = \frac{(5 + 6) \times 3}{2} = \frac{11 \times 3}{2} = \frac{33}{2} = 16.5[/tex]
d)
[tex]a \times h = 2 \times 5 = 10[/tex]
