Elena 's backyard is in the shape of a rectangle. she created a triangular-shaped flower bed (shown as the region) to plant flowers in

Plz hurry evaluate the expression a+b where a=8 and b=19

Triangles abc and dfg are given. find the lengths of all other sides of these triangles if: b ∠a≅∠d, ab·dg=ac·df, ac=7 cm, bc=15 cm, fg=20 cm, and df-ab=3 cm.

Vertical angles must check all that apply