19. Slope AB = (-8 - -11)/ (4 - 5) = 3/-1 or -3/1
CD = (-1 - 8)/ (-4 - -7) = -9/3 or -3/1
Since the slopes are the same, they are parallel
20. Slope AB = (1 - -3)/ (15 - 8) = 4 /7
CD = (3 - 10)/ (-5 - -9) = -7/4
They are opposite signs and reciprocals so they are perpendicular
21. Slope AB = (9 - 9)/(4 - -3) = 0/7 = 0 so it’s a vertical line
CD = (-2- -2)/ (6 - 10) = 0/-4 = 0 so it’s also a vert. Line
They are parallel.
Answer:
Slope is 1/3.
Step-by-step explanation:
..........
Answer:
D=12
Step-by-step explanation:
BECAUSE THAT IS DIVITION METHOD
Answer:
Step-by-step explanation:
Look at the picture.
ΔABC and ΔDBA are similar (AA). Therefore the sides are in proportion:
We have
Substitute:
<em>cross multiply</em>
Answer:
Yes
Step-by-step explanation:
A triangle could be made with those angles because they equal 180 degrees. 125 + 20 + 35 = 180 degrees
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