If angle 10 and 15 are congruent ( the same) that would mean lines a and b would need to be parallel with each other because that have the same angles.
The answer ic C.
Answer:
C. lines a and b
Step-by-step explanation:
Angles ∡10 and ∡11 are congruent.
Also, angles ∡15 and ∡14 are congruent.
If ∡10 and ∡15 are congruent, it means that all of four angles ∡10, ∡11, ∡14, ∡15 are congruent.
That also means that ∡9, ∡12, ∡16 and ∡16 are congruent:
∡9=180°-∡10 and ∡13=180°-∡15
Since ∡10 and ∡15 are congruent, it yields that ∡9 and ∡13 are congruent.
Same argument for ∡12 and ∡16.
Therefore, lines a and b are parallel.
- 22°F
Given that :
Morning temperature = 15°F
Change in temperature = fall by 37 degree
The temperature of the end of the day:
Morning temperature + (change in temperature)
Fall by 37° = decrease in temperature by 37° = - 37°
15°F + (-37°F)
15°F - 37°F
= - 22°F
