Odpowiedź:
[tex]a = 12\\b = 6\\r = 5\\h = 4\\\\Obw=a+r+b+r = 12+5 + 6 + 5 = 28\\\\P = \frac{a+b}{2}\cdot h = \frac{12+6}{2}\cdot4 = 18\cdot2 = 36[/tex]
