What is the correct way to classify a triangle with angles that measure 20 , 40 and 120

Does anyone know how to do geometryme with this problem

Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e.g. 98.76543).

The functions below show the amount of money bella and sweet t had saved after earning money for doing chores. which description best compares the two functions?