2-D Shapes (Chapters 1 & 2)
Lesson 11: Composite 2-D Shapes (1.3 & 1.4)
Learning Goals of Lesson 11
By the end of this lesson, I can:
-break a composite 2-D figure down into basic 2-D shapes
-identify given values of a composite 2-D figure
-find missing side lengths of a composite 2-D figure
-find the perimeter of a composite 2-D figure
-find the area of a composite 2-D figure (add/subtract areas)
Video 1: What are Composite 2D Shapes/Figures?
Video 2: Area of a Composite or Compound 2D Shape?
Note: This video has two calculation errors. Focus on the strategy not steps.
Error 1: Area of the pink semi-circle should be ≈1.57 in², not 1.67 in²!
Error 2: Area of the white circle should be ≈254.47 cm², not half the circle!
Video 3: Find Area of a Composite Shape by Adding
Video 4: Find Area of a Composite Shape by Adding
Use π = 3.14 only when instructed in a question; otherwise use the π key.
Video 5: Find Area of a Composite Shape by Subtracting
Use π = 3.14 only when instructed in a question; otherwise use the π key.
Video 6: Area of Composite Shapes - Step-by-Step
Find the area of a composite shape by either adding or subtracting individual area of the shapes that form the composite shape.
Handout 1-23:
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Video 7: Perimeter of a Composite Shape
Note: Determine the missing side lengths first then add all the sides.
Video 8: Find Perimeter of a Composite Shape with Curves
Use π = 3.14 only when instructed in a question; otherwise use the π key.
Handout 1-24:
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Video 9: Find Perimeter Using Pythagorean Theorem
Video 10: Find Area Using Pythagorean Theorem
Handout 1-24:
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