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5-Minute Check5-Minute Check
Find the area of each figure.
1. A rectangle 3 inches by 7 inches.
2. A rectangle 2 cm by 8 cm. 3. A square with sides of 5 yd. 4. A square with 9 ft. per side.
Find the area of each figure.
1. A rectangle 3 inches by 7 inches.
2. A rectangle 2 cm by 8 cm. 3. A square with sides of 5 yd. 4. A square with 9 ft. per side.
Measurement: Area of Complex Figures
Measurement: Area of Complex Figures
By Mr. BalesBy Mr. Bales
ObjectiveObjective
By the end of the lesson, you will be able to find the area of complex figures.
Standard 4MG1.4 - Students will understand and use formulas to solve problems involving…areas of rectangles and squares. Use those formulas to find the areas of more complex figures by dividing the figures into basic shapes.
By the end of the lesson, you will be able to find the area of complex figures.
Standard 4MG1.4 - Students will understand and use formulas to solve problems involving…areas of rectangles and squares. Use those formulas to find the areas of more complex figures by dividing the figures into basic shapes.
TeachTeach
With me, draw the letter L in block style on your graph paper. We will be dividing the letter into 2 small rectangles.
What is the formula we can use to find the area of each rectangle?
A = l x w Find the area of each rectangle using the
formula. Check answer by counting the squares. Explain how we would find the area of the letter
L.
With me, draw the letter L in block style on your graph paper. We will be dividing the letter into 2 small rectangles.
What is the formula we can use to find the area of each rectangle?
A = l x w Find the area of each rectangle using the
formula. Check answer by counting the squares. Explain how we would find the area of the letter
L.
RhysRhys Luke is staying at a hotel that has a
swimming pool shown. Luke wants to know the area of the pool. How can he find the area?
Luke is staying at a hotel that has a swimming pool shown. Luke wants to know the area of the pool. How can he find the area?
Complex FigureComplex Figure A complex figure is made up of
two or more shapes. To find the area of a complex figure, break the figure into smaller parts.
A complex figure is made up of two or more shapes. To find the area of a complex figure, break the figure into smaller parts.
Area of Complex FigureArea of Complex Figure
Find the area of the swimming pool at Luke’s hotel.
Step 1 - Break the figure into smaller parts. Look for the rectangles and squares.
Find the area of the swimming pool at Luke’s hotel.
Step 1 - Break the figure into smaller parts. Look for the rectangles and squares.
Rectangle10 m
10 m
12 m
6 m
6 m
12 m 10 m
Square
Let’s watch the Concept in Motion!!
Area of a Complex FigureArea of a Complex Figure
Rectangle A = length x width A = l x w A = 12 m x 6 m A = 72 square
meters
Rectangle A = length x width A = l x w A = 12 m x 6 m A = 72 square
meters
Square A = side x side A = s x s A = 10 m x 10 m A = 100 square
meters
Square A = side x side A = s x s A = 10 m x 10 m A = 100 square
meters
• Step 2 - Find the area of each part.
Step 3 - Add the areas.
• The area is 72 + 100 or 172 square meters.
Let’s Hear From Mr. Hardesty!!
Let’s Hear From Mr. Hardesty!!
"Here you are Mr. Bales!" uttered the computer. "Why, thank-you computer, " exclaimed Mr. Bales
"Here you are Mr. Bales!" uttered the computer. "Why, thank-you computer, " exclaimed Mr. Bales
Bales Bucks!!Bales Bucks!!
AssignmentAssignment
Page 456 - #’s 6 - 11 Get them all correct, No Math
Homework
Page 456 - #’s 6 - 11 Get them all correct, No Math
Homework
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