1. Bila terdapat ruas garis AB. Tentukan titik tengah ruas garis tersebut bila diketahui A(−18,−5) dan B(6,−4)!

1. Bila terdapat ruas garis AB. Tentukan titik tengah ruas garis tersebut bila diketahui A(−18,−5) dan B(6,−4)!

Jawaban yang benar adalah (-6, -9/2).

Perhatikan konsep pembahasan  berikut.

Misalkan terdapat dua titik A(x1, y1) dan B(x2, y2) dengan titik tengah T, sehingga T dirumuskan:
T((x1 + x2)/2, (y1 + y2)/2)

Titik tengah ruas garis AB yaitu:
((-18 + 6)/2, ((-5 + (-4))/2)
((-12/2), (-9/2))
(-6, -9/2)

Jadi titik tengah ruas garis AB adalah (-6, -9/2).

 

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Baca Juga :  Ladies and Gentlemen, in case of emergency, take the life jacket which is located under your seat. Put the life jacket over your head and then fasten the jacket tapes around your waist. Do not inflate the jacket until you left the aircraft. The jacket will be automatically inflated by pulling a cord, but if not, you can blow into the chip to inflate it. A light is attached to the jacket for attracting attention. The life jacket should be removed only in case of an emergency. The use of TV sets AM and FM radio cassettes recorders, walkman, and any mobile phones are prohibited onboard as they interfere the communication and navigational system. We wish you an enjoyable flight. Where is the life jacket located?