Answer:
1: something because you didn't give another number. For example, 1:2 is 1 golf ball to 2 golf tees. A ratio is one thing comparing to another. Hope this helps! I learned this in 6th grade. Brainly if so!
Step-by-step explanation:
Answer:
Step-by-step explanation:


The base is same power can be add or subtract


The sum of two supplementary angles is 180 degrees.
A+B=180.
80+B=180
B= 180-80
B=100