A.
[tex]a \times h = 15 \times 6 = 90[/tex]
B.
[tex] \frac{a \times h}{2} = \frac{8 \times 10}{2} = \frac{80}{2} = 40[/tex]
C.
[tex] \frac{(a + b) \times h}{2} = \frac{(11 + 5) \times 5}{2} = \frac{16 \times 5}{2} = 8 \times 5 = 40[/tex]
D.
[tex] \frac{(a + b) \times h}{2} = \frac{(5 + 4) \times 10}{2} = \frac{9 \times 10}{2} = \frac{90}{2} = 45[/tex]
Odpowiedź: A
