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Gyaan Maths
CBSE · Class 6-12
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CBSE Maths · Class 9

Chapter 6: Measuring Space: Perimeter and Area

Name: ________________________
Date: ______________
Marks: ____ / 5

Heron's formula, areas of quadrilaterals, and mixed shapes.

Questions

  1. Triangle sides 5, 12, 13. Area?
  2. Equilateral side 4. Area?
  3. Isoceles sides 5, 5, 6.
  4. Trapezium: parallel 10, 14; height 6.
  5. Perimeter of triangle 7, 24, 25.

Extra Practice (Optional)

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Answer Key (For Teachers)

  1. Answer: 3030
    Working: s=15s=15; Heron or right triangle.
  2. Answer: 434\sqrt 3
    Working: Formula.
  3. Answer: 1212
    Working: s=8s=8; Heron.
  4. Answer: 7272
    Working: 12⋅24⋅6\tfrac 12\cdot 24\cdot 6.
  5. Answer: 5656
    Working: Sum.
Gyaan Maths · CBSE Class 9 · Chapter 6
Gyaan Maths — CBSE Class 6-12, built for board-toppers.
v1.1 · Sept 2026