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DSSSB TGT Mensuration — practice questions

Explore 9 free Mensuration questions in DSSSB TGT Mathematics. Open each question or exercise to read its content, reference answers and available explanation.

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Mensuration questions and exercises with answers

Showing questions 1–9 of 9.

The total length around the border of a closed shape is called its:Read the answer and worked solution →The perimeter of a rectangle with length a and width b is:Read the answer and worked solution →The Greek letter that represents the ratio of a circle's circumference to its diameter is:Read the answer and worked solution →What is the perimeter of an equilateral triangle of side 7 cm?Read the answer and worked solution →The circumference of a circle of radius 7 cm (use π ≈ 22/7):Read the answer and worked solution →The area of a rectangle of length 12 cm and width 5 cm is:Read the answer and worked solution →The area of a triangle with base b and height h is:Read the answer and worked solution →A square garden of side 20 m is surrounded by a path of uniform width 1 m on the outside. The AREA of the path (only the path, not the garden) is:Read the answer and worked solution →Two circles have radii in the ratio 2:3. The ratio of their CIRCUMFERENCES is:Read the answer and worked solution →

Worked practice questions

The total length around the border of a closed shape is called its:

  1. Area
  2. Perimeter
  3. Volume
  4. Radius
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Correct answer: B. Perimeter

Perimeter is the distance around the boundary of a shape. A small insect walking once around the border, without turning back, would cover the perimeter. **SI unit:** metre (or any length unit).

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The perimeter of a rectangle with length a and width b is:

  1. a + b
  2. ab
  3. 2(a + b)
  4. 2ab
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Correct answer: C. 2(a + b)

A rectangle has two equal pairs of opposite sides — length a and width b. Perimeter = a + b + a + b = 2(a + b). For a square (special case with a = b), this becomes 4a.

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The Greek letter that represents the ratio of a circle's circumference to its diameter is:

  1. α (alpha)
  2. β (beta)
  3. π (pi)
  4. σ (sigma)
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Correct answer: C. π (pi)

π (pi) is the ratio C/D, the circumference of a circle divided by its diameter. It is irrational (~3.14159…) and the same for ALL circles, regardless of size.

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More Mathematics topics

SequencesBinomial TheoremGeometryProbability & StatisticsSequences and SeriesVectors & 3D GeometryProbabilityCorrelation and Regression