At a school there are two sections of algebra I for students in the 9th grade. The two classes have different teachers. The principal is interested in gauging the effectiveness of two different teaching methods and asks each teacher to try one of the other methods. At the end of the semester both classes are given the same test and the results are compared. In this experiment, which is the variable of interest? A. The two different math classes B. The two different teaching methods C. The two different math teachers D. The two different class test results

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle

Idon’t know what the answer is i wish i could

(ersvaetfceqcqmsemar,r,aar,ha,raraahha