Odpowiedź:
I RY I² = ( 1 - (-2))² + (-2 - (-7))² = 3² + 5² = 9 + 25 = 34
I RY I = [tex]\sqrt{34}[/tex]
I RS I² = ( - 4 - (-2))² + ( 1 - (- 7))² = ( -2)² + 8² = 4 + 64 = 68 = 4*17
I RS I = [tex]\sqrt{4*17} = 2\sqrt{17}[/tex]
I YS I² = ( - 4 - 1)² + ( 1 - (-2))² = ( -5)² + 3² = 25 + 9 = 34
I YS I = [tex]\sqrt{34}[/tex]
Obwód Δ
L = [tex]\sqrt{34} + 2\sqrt{17} + \sqrt{34}= 2\sqrt{34} + 2\sqrt{17}[/tex]
==================================
Najdłuższy bok : RS
W = ( [tex]\frac{- 2 - 4}{2}[/tex] , [tex]\frac{- 7 + 1}{2}[/tex] ) = ( -3 , -3)
===========================
Y = ( 1 , - 2)
I WY I² = (1 - (-3))² + ( - 2 - (-3))² = 4² + 1² = 16 + 1 = 17
I WY I = [tex]\sqrt{17}[/tex]
==============
Szczegółowe wyjaśnienie:
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Odpowiedź:
I RY I² = ( 1 - (-2))² + (-2 - (-7))² = 3² + 5² = 9 + 25 = 34
I RY I = [tex]\sqrt{34}[/tex]
I RS I² = ( - 4 - (-2))² + ( 1 - (- 7))² = ( -2)² + 8² = 4 + 64 = 68 = 4*17
I RS I = [tex]\sqrt{4*17} = 2\sqrt{17}[/tex]
I YS I² = ( - 4 - 1)² + ( 1 - (-2))² = ( -5)² + 3² = 25 + 9 = 34
I YS I = [tex]\sqrt{34}[/tex]
Obwód Δ
L = [tex]\sqrt{34} + 2\sqrt{17} + \sqrt{34}= 2\sqrt{34} + 2\sqrt{17}[/tex]
==================================
Najdłuższy bok : RS
W = ( [tex]\frac{- 2 - 4}{2}[/tex] , [tex]\frac{- 7 + 1}{2}[/tex] ) = ( -3 , -3)
===========================
Y = ( 1 , - 2)
I WY I² = (1 - (-3))² + ( - 2 - (-3))² = 4² + 1² = 16 + 1 = 17
I WY I = [tex]\sqrt{17}[/tex]
==============
Szczegółowe wyjaśnienie: