Kaj je obod trikotnika s koti (1, 4), (6, 7) in (4, 2)?

Kaj je obod trikotnika s koti (1, 4), (6, 7) in (4, 2)?
Anonim

Odgovor:

Obseg # = sqrt (34) + sqrt (29) + sqrt (13) = 3,65555 #

Pojasnilo:

#A (1,4) # in #B (6,7) # in #C (4,2) # so tocke trikotnika.

Najprej izračunajte dolžino stranic.

Razdalja AB

#d_ (AB) = sqrt ((x_A-x_B) ^ 2 + (y_A-y_B) ^ 2) #

#d_ (AB) = sqrt ((1-6) ^ 2 + (4-7) ^ 2) #

#d_ (AB) = sqrt ((- 5) ^ 2 + (- 3) ^ 2) #

#d_ (AB) = sqrt (25 + 9) #

#d_ (AB) = sqrt (34) #

Razdalja BC

#d_ (BC) = sqrt ((x_B-x_C) ^ 2 + (y_B-y_C) ^ 2) #

#d_ (BC) = sqrt ((6-4) ^ 2 + (7-2) ^ 2) #

#d_ (BC) = sqrt ((2) ^ 2 + (5) ^ 2) #

#d_ (BC) = sqrt (4 + 25) #

#d_ (BC) = sqrt (29) #

Razdalja BC

#d_ (AC) = sqrt ((x_A-x_C) ^ 2 + (y_A-y_C) ^ 2) #

#d_ (AC) = sqrt ((1-4) ^ 2 + (4-2) ^ 2) #

#d_ (AC) = sqrt ((- 3) ^ 2 + (2) ^ 2) #

#d_ (AC) = sqrt (9 + 4) #

#d_ (AC) = sqrt (13) #

Obseg # = sqrt (34) + sqrt (29) + sqrt (13) = 3,65555 #

Bog blagoslovi …. Upam, da je razlaga koristna.