Odpowiedź:
I AC I = 2 - (- 3) = 5
------------------------------
I AB I² = ( - 1 - (-3))² + ( 3 - (-1))² = 2² + 4² = 4 + 16 = 20 = 4*5
I AB I = [tex]\sqrt{4*5} = 2 \sqrt{5}[/tex]
-----------------------------
I BC I² = ( 2 - (-1))² + ( - 1 - 3)² = 3² + ( - 4)² = 9 + 16 = 25
I BC I = [tex]\sqrt{25} = 5[/tex]
---------------------------
Obwód Δ
L = 2√5 + 5 + 4 = 9 + 2√5
==============================
Szczegółowe wyjaśnienie:
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Odpowiedź:
I AC I = 2 - (- 3) = 5
------------------------------
I AB I² = ( - 1 - (-3))² + ( 3 - (-1))² = 2² + 4² = 4 + 16 = 20 = 4*5
I AB I = [tex]\sqrt{4*5} = 2 \sqrt{5}[/tex]
-----------------------------
I BC I² = ( 2 - (-1))² + ( - 1 - 3)² = 3² + ( - 4)² = 9 + 16 = 25
I BC I = [tex]\sqrt{25} = 5[/tex]
---------------------------
Obwód Δ
L = 2√5 + 5 + 4 = 9 + 2√5
==============================
Szczegółowe wyjaśnienie: