20 !
which of the following angles would form an obtuse isosceles triangle?

a: 90°, 30°, 60°
b: 100°, 40°, 40°
c: 30°, 75°, 75°

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy