Question

For what value of x are lines m and n parallel?
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a. x= 10
b. x= 15
c. x= 20
d. x= 60

Answer 1

If m//n, 8x=10x-30 (alt angles)

Answer 2

@kc_kennylau what does that mean?

Answer 3

If m is parallel to n, 8x=10x-30 because of alternate angles

Answer 4

so how do i find the answer? :( sorry...

Answer 5

Solve the equation 8x=10x-30

Answer 6

Or I should say it the other way round, if 8x=10x-30, m will be parallel to n

Answer 7

okay thank you so much!

Answer 8

no problem

Answer 9

would you want to help me with another? :) @kc_kennylau

Answer 10

of course

Answer 11

okay here it is:

Answer 12

An artist is making a perspective drawing of a sidewalk. What should the unknown angle measure be in order for the sides of the sidewalk to be parallel?

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fifty degrees
one hundred degrees
one hundred thirty degrees
one hundred eighty degrees

Answer 13

@kc_kennylau

Answer 14

The two lines are parallel IF:
1. a=e or b=f or c=g or d=h (reason: corr ∠s eq) OR
2. b+e=180 or c+h=180 (reason: int ∠s supp) OR
3. b=h or c=e (reason: alt ∠s eq)

Answer 15

You have to remember these

Answer 16

I will. Okay, now how do I know what the answer is now?

Answer 17

@kc_kennylau

Answer 18

Use the second

Answer 19

Is it 130 degrees because 50 + 130 = 180?

Answer 20

@kc_kennylau

Answer 21

yes

Answer 22

thank you :)

Answer 23

I got 90% on the quiz due to my own failure in answers :) *fan*