1. Areas of Polygons and Circles
Chapter 11

2. Areas of Parallelograms
Section 11.1

3. Areas of Parallelograms
• How do I find the perimeters and areas of
parallelograms?
• How do I tell if a points on a coordinate plane
define a parallelogram?

4. Parallelogram Review
• Parallelogram –
Quadrilateral with opposite
sides parallel.
• Opposite sides and angles
are congruent.

5. Perimeter
• Perimeter: sum of all the sides

6. Area of a Parallelogram
•

7. Example
• Find the perimeter and area of parallelogram
RSTU.

8. Example
• Find the perimeter and area of parallelogram
DEFG.

9. Application
• The Kanes are
planning to sod 200 ft
some parts of their
yard. Find the
number of square
yards of grass
needed.
150 ft

10. Application
• The Wagners
are planning to
put hardwood
floors in their
dining room,
living room,
and kitchen.
Find the
number of
square yards of
wood needed.

11. Coordinate Plane
• Plot: A(-2, 3), B(4, 1),
C(3, -2), and D(-3, 0)
on the Coordinate
Plane.
• Is the quadrilateral a
square, rectangle, or
parallelogram?
• b) Find the area of
the figure.

12. Coordinate Plane
• Plot: A(-1, 1), B(1, 4),
C(5, 4), and D(3, 1) on
the Coordinate Plane.
• Is the quadrilateral a
square, rectangle, or
parallelogram?
• b) Find the area of
the figure.

13. Homework
• Page 598
▫ #12 – 26 Even

14. Lesson Plan
• Intro
▫ Areas of parallelogram
• Standards- 10.1
• Supplies – slides, whiteboard, note sheets
• Timing: One day for notes, one day for a combined
review of 10.1 and 10.2 followed by a quiz
• Day 1:
▫ Essential Questions- slides 3
▫ Input-slides 4, - 6
▫ Guided Practice - slides 7 - 12
▫ Independent Practice – bookwork