Tolong jawab dong29 sampai 33

28. (3,-5) (-2,-3)
y-y1  = x-x1
------     ------
y2-y1   x2-x1
y+5    =  x+2        y+5       -5
-----      -------   =  ----- x ------  =  -5y - 25 +2x +4 = -5y + 2x -19
-3+5      -2-3         2       x+2

29. BC 2 = AB2 + AC2
30. Gunakan rumus phytagoras
p = akar 17 kuadrat - 8 kuadrat
p = akar 289 - 64
p = akar 225
p = 15 cm