Given a∥b , and c is not parallel to a or b, which statements must be true? Select each correct answer.

m∠7=m∠11

m∠4=m∠5

m∠5=m∠12

m∠1=m∠5
three lines a, b, and c that look somewhat horizontal. they are cut by a transversal forming 12 angles. line a intersects the transversal for form angles 1, 2, 4, 3 clockwise starting from the top left. line b intersects with the transversal to form angles 5, 6, 8, 7 clockwise starting from top left. line c intersects with the transversal to form angles 9, 10, 12, and 11 clockwise starting from top left. 94 POINTS WILL GIVE BRAINLIESTf

1. We have been given that a∥b , and c is neither parallel to a nor b.

Let us see which of our given options are correct.

A. m∠7 can not be equal to m∠11  as line c is not parallel to line a.

B. m∠5 can not be equal to m∠12 as line c is not parallel to line b.

C. By alternate interior angles m∠4=m∠5  as ∠4 is inside line a and ∠5 is inside line b. Both angles are on the opposite sides of transversal.  

D. Since we know that corresponding angles are congruent. We can see that ∠5 corresponds to ∠1, therefore, m∠1=m∠5.

Therefore, Option C and D are correct choices.

2. We have been given that  AB∥CD and m∠4=85°. We are asked to find measure of ∠5.

Since we know that same side interior angles are supplementary. In our figure we can see that  ∠4 and ∠5 are same side interior angles.

Therefore, measure of ∠5 will be 95 degrees.  

Step-by-step explanation:

1. is m∠4=m∠5 by the alternate interior angle theorem.

2. Angles 4 & 3 are supplementary angles or linear pair and so they have to equal 180 and 180 - 85= 95 3 & 5 are corresponding angles so 95 should be your answer.

plz give braniy

19.side- angle- side

20. angle- side- angle

step-by-step explanation:

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17