geometry/notes 11.1
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![Page 1: Geometry/Notes 11.1](https://reader033.vdocuments.us/reader033/viewer/2022061206/5482982b5906b5a8158b45b0/html5/thumbnails/1.jpg)
Areas of Polygons and CirclesChapter 11
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Areas of ParallelogramsSection 11.1
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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?
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Parallelogram Review
•Parallelogram – Quadrilateral with opposite sides parallel.
•Opposite sides and angles are congruent.
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Perimeter
•Perimeter: sum of all the sides
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Area of a Parallelogram
•Area = base height
•Base = any side
•Height = line perpendicular to that side
•How many options?
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Example
•Find the perimeter and area of parallelogram RSTU.
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Example
•Find the perimeter and area of parallelogram DEFG.
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Application• The Kanes are
planning to sod some parts of their yard. Find the number of square yards of grass needed.
200 ft
150 ft
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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.
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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.
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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.
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Homework
•Page 598▫#12 – 26 Even
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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