(02.07) Which relationship is always true for the angles r. x, y, and z of Triangle ABC? (4 points)

 Choice B) 180 - x = r

Explanation:

Angles r and x form a straight line, or straight angle, that is 180 degrees.

We then can say

r+x = 180

r+x-x = 180-x subtract x from both sides

r = 180-x

180-x = r

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)