1. Geometry 7 December 2012 1) Place your book and binder on your desk. 2) Put papers from folder into in your binder. 3) CHECK your HOMEWORK. 4) WARM UP- DO pg. 304: 7 - 9

2. objective students will explore and apply polygon properties. students will work collaboratively to do investigations and determine conjectures and show understanding on a quiz

3. Kite Properties

4. Isosceles Trapezoids

5. Properties of Polygons Complete Investigations in sections 5.4 We will do these as a class. Think- Pair- Share Fill in handout and attach any papers.

6. Midsegment of a trapezoid The midsegment of a trapezoid is the segment that connects the midpoints of its legs.

7. Midsegment of a trapezoid The midsegment of a trapezoid is parallel to each base and its length is one half the sums of the lengths of the bases. MN ║AD, MN║BC MN = ½ (AD + BC)

8. Ex. 3: Finding Midsegment lengths of trapezoids LAYER CAKE A baker is making a cake like the one at the right. The top layer has a diameter of 8 inches and the bottom layer has a diameter of 20 inches. How big should the middle layer be?

9. Ex. 3: Finding Midsegment lengths of trapezoids Use the midsegment theorem for trapezoids. DG = ½(EF + CH)= ½ (8 + 20) = 14” C D E D G F

10. Quiz Do your best. Silence please. SHOW thinking, clearly and concisely, easy for Others to follow. FINISHED? You may start Your homework.