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Perimeter & Area of Parallelograms, Trapezoids, Rhombi & Kites.9.3.1.2 Compose and decompose two- and three-dimensional figures; use decomposition to determine the perimeter, area, surface area and volume of various figures
Guiding Question: How does perimeter/area change with different 2-d shapes? Lesson Obj: IWBAT decompose a
2-d shape to find its perimeter and area.
What is the difference between a parallelogram, a trapezoid, a rhombus, and a kite?
Guiding Question: How does perimeter/area change with different 2-d shapes?
A parallelogram looks like someone tried to push over a rectangle. Finding the perimeter is exactly the same.
P = 2l + 2w
The height is no longer the side of the shape. Area is still base x height.
GUIDING QUESTION: HOW DOES PERIMETER/AREA CHANGE WITH DIFFERENT 2-D SHAPES
Trapezoid: 1 pair of parallel sides.
Perimeter: Find the sum of all sides
Area: add the bases(parallel sides),
divide by 2, multiply by height.
Guiding Question: How does perimeter/area change with different 2-d shapesRHOMBUS: 4 EQUAL SIDES, DIAGONALS ARE PERPENDICULAR, DIAGONALS BISECT KITE: 2 SETS OF CONGRUENT SIDES, DIAGONALS ARE
PERPENDICULAR
Guiding Question: How does perimeter/area change with different 2-d shapesHOW CAN WE FIND THE PERIMETER AND AREA OF THIS RHOMBUS? WHAT IS THE AREA OF THIS KITE?
Guiding Question: How does perimeter/area change with different 2-d shapes Calculate the perimeter and area of
this rhombus.
GUIDING QUESTION: HOW DOES PERIMETER/AREA CHANGE WITH DIFFERENT 2-D SHAPES
A baseball diamond is a rhombus
with each side being 90 feet
(between the bases). What is the
perimeter (distance around the
bases) & the area inside of the
diamond?
Guiding Question: How does perimeter/area change with different 2-d shapes? Assignment: Parallelogram/trapezoid WS
Day 2: Trapezoid/Rhombus/Kite WS