How can a shape have perdindicular but not parallel sides?

Given: ac and db are diameters. m∠3=

Order the measurements from the least to the greatest. 2,720 ml , 24.91 l , 0.0268 kl

Let u = {q, r, s, t, u, v, w, x, y, z} a = {q, s, u, w, y} b = {q, s, y, z} c = {v, w, x, y, z}. list the elements in the set.a ∩ (b ∪ c)a) {q, s, w, y}b) {q, y, z}c) {q, s, u, w, y, z}d) {q, r, w, y, z}