Idon't know how my teacher got from 990/4 to 495/2

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?

Which diagram shows lines that must be parallel lines cut by transversal?

Match the following reasons with the statements given to create the proof. 1. do = ob, ao = oc sas 2. doc = aob given 3. triangle cod congruent to triangle aob vertical angles are equal. 4. 1 = 2, ab = dc if two sides = and ||, then a parallelogram. 5. ab||dc if alternate interior angles =, then lines parallel. 6. abcd is a parallelogram cpcte