if tu = 6 units, what must be true? su + ut = rt rt + tu = rs rs + su = ru tu + us = rs; what is qs? 2 units. 5 units. 17 units. 33 units.; what is the measure of angle c? 25ยฐ 30ยฐ 60ยฐ 75ยฐ; which value of x would make ? 1 6 8 10; what is the measure of angle l in parallelogram lmno 20 30 40; which is precisely defined using the undefined terms point and plane?; which shows the pre-image of triangle x'y'z' before the figure was rotated 90ยฐ about the origin?; what is the length of line segment lj? 9 units 12 units 15 units 18 units