Answer:
a logic as a system of reasoning for properly arranging
Explanation:
An Isosceles triangle has two even parts, you add them up. For example 60 degree plus another 60 degree angle is 120 degrees. And the limit is 180 degrees, so in order to get that last angle, you'd have to subtract 160 from 180. And that'd be 20 degrees. I couldn't see the question but I hope this helps you in a way
We would need to see the picture to answer
Ethnicity is a term that can be categorized by race, nationality, religion etc... All those things can determine ethnicity.