Ariketen ebazpenak

1. P(-3,1) puntutik pasa eta r: 2x-5y+4=0 zuzenarekiko paraleloa den zuzen bat eta perpendikularra den beste bat.

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2. A(2,-3), B(5,2) eta C(4,4) puntuak emanik, aurkitu D puntu bat non, ABCD paralelogramoa den. Diagonalen erdiguneak puntu berean daudela konprobatu.

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3. A(1,-3) puntuaren simetrikoa aurkitu, r: x+2y-3=0 zuzenarekiko.

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4. y=3x+5, y=-2x+1 zuzenek osatzen duten angelua kalkulatu.

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5. P(3,8), Q(-11,3) eta R(-8,-2) puntuak triangelu baten erpinak dira. Triangelua isoszelea dela konprobatu eta kalkulatu bere  azalera.

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6. A(2,1) eta B(1,-3) puntuetatik distantziakide den r: 4x-8y+7=0 zuzenaren puntua aurkitu.

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7. P(2,0), Q(0,1) eta R(-3,-2) puntuetan erpinak dituen triangeluaren ortozentroa eta zirkunzentroa.

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8a. A(-1,1) eta B(5,3) puntuak emanik, zer baldintzak bete behar ditu  C(x,y) puntu batek, ABC triangelua isoszelea izan dadin, AB aldea desberdina dela jakinik
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8b. A(-1,1) eta B(5,3) puntuak emanik, zer baldintzak bete behar ditu  C(x,y) puntu batek, ABC triangelua azalera 5 izan dadin:

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8c. A(-1,1) eta B(5,3) puntuak emanik, zer baldintzak bete behar ditu  C(x,y) puntu batek, ABC triangelua aldekidea izan dadin:
 

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8d.A(-1,1) eta B(5,3) puntuak emanik, zer baldintzak bete behar ditu  C(x,y) puntu batek, ABC triangelua angeluzuzena izan dadin C erpinan:
 

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Creado con GeoGebra por Manuel Sada Allo (Agosto 2006). Itzulpena G. Ucar