x + y = 0
y = - x y = 2 x = -4
y = 2 i y = -x ⇒ x = -2
a = | -4 - (-2) | = | - 4 + 2| = | - 2| = 2 -------- podstawa trójkata
x = -4 i y = -x ⇒ y = 4
h = |4 - 2| = | 2 | = 2 ------- wysokosć trójkąta
P = 1/2 * a * h
P = 1/2 * 2 * 2
P = 2 [j²] ----------- odpowiedź
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x + y = 0
y = - x y = 2 x = -4
y = 2 i y = -x ⇒ x = -2
a = | -4 - (-2) | = | - 4 + 2| = | - 2| = 2 -------- podstawa trójkata
x = -4 i y = -x ⇒ y = 4
h = |4 - 2| = | 2 | = 2 ------- wysokosć trójkąta
P = 1/2 * a * h
P = 1/2 * 2 * 2
P = 2 [j²] ----------- odpowiedź