Class 18

Friday, February 20

Today’s Discussion Topics

Go over discussion topic and homework from last time

Today’s New Topics

Quadrilaterals

Tonight’s Homework

Read Section 4.6
Do exercises 7, 9, and 11 in Section 4.6
(For Ex. 9, use the results of Ex. 8)
Discussion Topic for next time: What are some statements equivalent to the
Euclidean Parallel Postulate?