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Perimeter or area?

Exercise and reference answers

Left
Perimeter
Items
  1. Item
    4a for a square
    Answer
    Perimeter
  2. Item
    2 pi r
    Answer
    Perimeter
  3. Item
    2(a + b)
    Answer
    Perimeter
  4. Item
    Half base x height
    Answer
    Area
  5. Item
    Heron's formula
    Answer
    Area
  6. Item
    Brahmagupta rule
    Answer
    Area
Right
Area
Instructions
Swipe left for a perimeter, right for an area.

Explanation

_Source: syllabus Mathematics, Ch 6 'Measuring Space: Perimeter and Area'_
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