Area and Perimeter
Grade Four · Lesson 27 · 3:19 · Animated lesson with English narration
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Transcript
Axiom 1: The area of any shape is greater than or equal to zero. Axiom 2: Two shapes that completely overlap have equal area. Axiom 3: Shapes placed together without overlapping,
total area equals sum of parts. Axiom 4: A square with side length 1 has area 1. These four are the foundation. All area formulas derive from them. Side equals 1. Area equals 1.
A rectangle with length 3 and width 2. Area equals 1 plus 1 plus 1 plus 1 plus 1 plus 1, equals 3 times 2. A rectangle with length 6 and width 4. A rectangle with length 8 and width 3.
A rectangle with length 10 and width 7.
Transcript generated from the lesson narration.
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