Download Lesson 15.3 Continued

Warm-Up
1. Given a triangle, describe in words how you
would locate a point that is equidistant from
each of the three vertices of the triangle.
2. What would you do if instead you wanted to
find a point that is equidistant from the sides
of the triangle?
Lesson 15.6: Properties of
Parallelograms
Definition of a Parallelogram:
A parallelogram is a quadrilateral with two
pairs of sides parallel.
Properties of a Parallelogram
1. In a parallelogram, both pairs of opposite
sides are parallel. (Definition)
2. In a parallelogram, both pairs of opposite
sides are congruent. (Theorem)
3. In a parallelogram, both pairs of opposite
angles are congruent. (Theorem)
4. In a parallelogram, the diagonals bisect each
other. (Theorem)
Group Activity
Get into your groups and complete the following
proofs in your textbook:
1. Explain 1, Example 1 on pg. 789
2. Explain 2, Example 2 on pg. 790
Explain 1, Example 1
Explain 2, Example 2