MICRO LESSON 1
Meaning of Area
Picture it:
Area measures surface covered.
Simple:
It is expressed in square units.
Example:
A 5 m by 3 m floor has 15 m².
Quick Check:
Why are units squared?
MICRO LESSON 2
Parallelogram Area
Picture it:
A slanted parallelogram can be rearranged into a rectangle.
Simple:
Area = base × corresponding height.
Example:
b×h.
Quick Check:
Is slant side the height?
MICRO LESSON 3
Triangle Area
Picture it:
Two equal triangles can form a parallelogram.
Simple:
Area = 1/2 × base × height.
Example:
Base 8, height 5 gives 20.
Quick Check:
Find area for b=10,h=6.
MICRO LESSON 4
Same Base and Same Parallels
Picture it:
Shapes between the same parallels share the same height.
Simple:
Parallelograms on same base and between same parallels have equal areas.
Example:
Different slants, same base and height.
Quick Check:
Does slant change area?
MICRO LESSON 5
Triangles on Same Base
Picture it:
Triangles on same base and between same parallels have equal areas.
Simple:
Their heights are equal.
Example:
Two peaks on same parallel line.
Quick Check:
Why are heights equal?
MICRO LESSON 6
Equal Area Reasoning
Picture it:
We compare areas without always calculating dimensions.
Simple:
Theorems allow direct comparison.
Example:
If two triangles share base and parallel top line, areas equal.
Quick Check:
What conditions are required?