The answer is 90 different pairs.
So if there are 10 topics and each will get 9 pairings , so the over all pairs you will get is 90.
Answer:
Step-by-step explanation:
i think its number one or 2
Answer:
angle2=23°
angle7=angle5
angle2=angle6
so,angle8=23°
total angle = 180°
angle7=180°-46°=134°÷2=67°

As we know, slope (m) is equal to tan θ for a straight line :


So, we can say that it's a positive constant slope