AB = √(x2-x1)²+(y2-y1)²+(z2-z1)² = √(3-0)²+(2-6)²+(-4-8)² = √3²+4²+12² = √9+16+144 = √25+144 = √169 = 13
AB = √(x2-x1)²+(y2-y1)²+(z2-z1)² = √(3-0)²+(2-6)²+(-4-8)² = √3²+4²+12² = √9+16+144 = √25+144 = √169 = 13