1
Perimeter
Explain perimeter as total length around a shape
Chapter route
Area and Perimeter
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Ordered curriculum items
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2
Perimeter
Find perimeter of rectangles and polygons
3
Pi and Circumference
Explain constant circumference-to-diameter ratio
4
Pi History
Know approximations by Archimedes, Aryabhata and Zu Chongzhi
5
Circumference
Use circle circumference formula
6
Arc Length
Use arc length formula with angle and radius
7
Applications
Solve real-life boundary and arc problems
8
Area Basics
Use rectangle area in simple and composite shapes
9
Area Basics
Use base and height for parallelogram area
10
Area Basics
Use base-height triangle area formula
11
Triangle Area Reasoning
Use equal-base equal-height reasoning
12
Heron Formula
Find triangle area from side lengths
13
Sulbasutra Area
Connect ancient constructions with area reasoning
14
Circle Area Derivation
Explain circle area conceptually
15
Circle Area
Use area formula for circles
16
Sector Area
Use angle-based sector area formula
17
Segments
Find sector and segment areas in circle problems
18
Brahmagupta Formula
Find area of cyclic quadrilaterals using side lengths
19
Special Cases
Understand formula relationships
20
Generalisation
Connect formulas through generalisation
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