How to write 10-3 two ways

Select the best attribute for the angle pair formed by two parallel lines intersected by a transversal.

Brook states that the distance on the line is 4 units. caleb states that the whole line does not have a distance because it continues on forever. vivian states that the line is 6 units long. which distance did brook measure? which distance did vivian measure?

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?