You found the area of rectangles.
(Lesson 5–1)
• I CAN find areas of parallelograms.
• I CAN find areas of triangles and trapezoids.
• base
• altitude
Find Areas of Parallelograms
A. Find the area of the parallelogram.
Find Areas of Parallelograms
B. Find the area of the parallelogram.
A. Find the area of the parallelogram.
B. Find the area of the parallelogram.
Find Areas of Triangles
A. Find the area of the triangle.
Find Areas of Triangles
B. Find the area of the triangle.
A. Find the area of the triangle.
B. Find the area of the triangle.
Find Areas of Trapezoids
PLAYROOM The floor of a
playroom is shaped like a
trapezoid. Use the figure to find
the area of the playroom.
Find the area of the trapezoid.
You found the areas of parallelograms,
triangles, and trapezoids. (Lesson 11–6)
• I CAN find the area of composite figures.
• Solve problems involving the area of
composite figures.
• composite figure
Find the Area of Composite Figures
Find the area of the composite figure. Round to the
nearest tenth if necessary.
Find the area of the figure to the nearest tenth.
Solve Multi-Step Problems
CARPETING Carpeting costs $2 per square foot.
How much will it cost to carpet the area shown?
PAINTING One gallon of paint
is advertised to cover 100
square feet of wall surface.
About how many gallons will
be needed to paint the wall
shown?
Homework
GPA page 665 (8-32 even)
&
GPA page 686 (2-12 even, 19, 20)