Question

Am nevoie de ajutor la acest ex

Answer 1

Explicație pas cu pas:

A(2,2), B(5,0), C(4, -4), D(-2, 0)

AM ⊥ BD, CN ⊥ BD,

AM = 2 u, CN = 4 u, BD = 7 u

$Aria_{(ABCD)} = Aria_{(ABD)} + Aria_{(CBD)} \\ = \frac{AM \times BD}{2} + \frac{CN \times BD}{2} \\ = \frac{BD(AM + CN)}{2} = \frac{7(2 + 4)}{2} = 21 \: {u}^{2}$