Parallel line means the same slope
（8-1）/(-17-a)=(1-5)/(a+2)
so a is 18
Answer:
27
Step-by-step explanation:
Let the middle number be x.
(x - 1)(x)(x + 1) = 21,924
You can solve that equation, or you can use logic.
The 3 numbers are going to be close to the cubic root of 21,924.
cubic root of 21,924 = 27.988 or approx 28.
Try 27, 28, 29
27 * 28 * 29 = 21,924
Answer: 27
2*pi*10=62.83 is certainly your answer
Your answer would be 10.6
D 19 in2
find the area of a square, width times height
then find the area of the triangle, width times height divided by 2
