Name each line in 2 different ways:

1. what is the measure of ∠abc? what is the measure of ∠abd?

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

Which expression is rational? 6. , square root two, square root 14, square root 49