Question

garis k melalui titik A(-2,3) dan B(3,2). garis L melalui titik C(-6,5), D(-2,d), T(t,-5). garis k tegak lurus garis L. tentukan nilai d dan t.

Answer 1

M = (y2 -y1)/(x2 - x1)
m = (3 - 2)/(3 - (-2))
m = 1/5

garis berpotongan tegak lurus syarat nya m1.m2 = -1
m1.m2 = -1
1/5. m2= -1
m2 = -5

c (-6;5)
y - y1 = m(x - x1)
y - 5 = -5(x + 6)
y = -5x - 30 + 5
y = -5x - 25

D (-2;d)
d = -5(-2) - 25
d = 10 - 25
d = -15

T (t; -5)
-5 = -5(t) - 25
5t = -25 + 5
5t = -20
t = -4