Explicație pas cu pas:
Formula pentru calculul ariei unui triunghi este:
\[ A = \frac{1}{2} \times \text{bază} \times \text{înălțime} \]
a) \( A = \frac{1}{2} \times 6 \, \text{cm} \times 18 \, \text{cm} = 54 \, \text{cm}^2 \)
b) \( A = \frac{1}{2} \times 12 \, \text{cm} \times 7 \, \text{cm} = 42 \, \text{cm}^2 \)
c) \( A = \frac{1}{2} \times 26 \, \text{cm} \times 10 \, \text{cm} = 130 \, \text{cm}^2 \)
d) \( A = \frac{1}{2} \times 24 \, \text{cm} \times 16 \, \text{cm} = 192 \, \text{cm}^2 \)
e) \( A = \frac{1}{2} \times 22 \, \text{cm} \times 11 \, \text{cm} = 121 \, \text{cm}^2 \)
f) \( A = \frac{1}{2} \times 24 \, \text{cm} \times 6 \, \text{cm} = 72 \, \text{cm}^2 \)
Deci, ariile triunghiurilor respective sunt:
a) 54 cm²,
b) 42 cm²,
c) 130 cm²,
d) 192 cm²,
e) 121 cm²,
f) 72 cm².
