Construct a triangle ABC, in which AB = 6 cm, BC =5 cm and AC = 4 cm.

In triangle abc segment de is parallel to the side ac . (the endpoints of segment de lie on the sides ab and bc respectively). find de, if ac=20cm, ab=17cm, and bd=11.9cm;

Factor and solve to find roots x squared -x - 90 =0

(a.s."similarity in right triangles"solve for xa.) 10b.) 20c.) 14.5d.) [tex] 6\sqrt{3} [/tex]