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CBSE Class 9 Mensuration: Perimeter and Area — practice questions — page 2

Explore 103 free Mensuration: Perimeter and Area questions in CBSE Class 9 Mathematics. Open each question or exercise to read its content, reference answers and available explanation.

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Mensuration: Perimeter and Area questions and exercises with answers

Showing questions 31–60 of 103.

Find the next termRead the answer and worked solution →Sequences bingoRead the answer and worked solution →An algebraic identity is true for:Read the answer and worked solution →The expansion of (a - b)2 is:Read the answer and worked solution →Identities can be visualised using models that are:Read the answer and worked solution →36x2 + 12x + 1 is the square of:Read the answer and worked solution →Match the identityRead the answer and worked solution →Identity or not?Read the answer and worked solution →Pick the expansionRead the answer and worked solution →True or false about identitiesRead the answer and worked solution →Identity arithmeticRead the answer and worked solution →Complete the identityRead the answer and worked solution →Sort the expressionsRead the answer and worked solution →Identities bingoRead the answer and worked solution →The perimeter of a shape is the length around its:Read the answer and worked solution →A square of side a has perimeter:Read the answer and worked solution →An equilateral triangle of side a has perimeter:Read the answer and worked solution →A rectangle of length a and width b has perimeter:Read the answer and worked solution →The perimeter of a circle is called its:Read the answer and worked solution →The ratio of a square's perimeter to its side is always:Read the answer and worked solution →The circumference of a circle of diameter d is:Read the answer and worked solution →In terms of radius r, the circumference is:Read the answer and worked solution →The ratio of circumference to diameter is the same for:Read the answer and worked solution →Who introduced the Greek symbol for this ratio in 1706?Read the answer and worked solution →A triangle has base b and height h. Its area equals:Read the answer and worked solution →Two congruent triangles fitted together make a:Read the answer and worked solution →The semi-perimeter of a triangle is:Read the answer and worked solution →For a triangle of sides 3, 4 and 5, the semi-perimeter is:Read the answer and worked solution →Using Heron's formula, the area of the 3, 4, 5 triangle is:Read the answer and worked solution →Heron's formula finds a triangle's area from its:Read the answer and worked solution →

Worked practice questions

Find the next term

Read exercise and reference answers
Questions
  1. Question
    1, 4, 7, 10, ...
    Choices
    1. 13
    2. 14
    3. 11
    Correct choice
    13
  2. Question
    1, 2, 4, 8, ...
    Choices
    1. 10
    2. 16
    3. 12
    Correct choice
    16
  3. Question
    11, 7, 3, ...
    Choices
    1. 0
    2. 1
    3. -1
    Correct choice
    -1
  4. Question
    1, 3, 6, 10, ...
    Choices
    1. 15
    2. 13
    3. 20
    Correct choice
    15
Instructions
Tap the number that comes next.
_Source: syllabus Mathematics, Ch 8 'Predicting What Comes Next: Exploring Sequences and Progressions'_

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Sequences bingo

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Clues and terms
  1. Clue
    An ordered list of numbers.
    Item
    Sequence
  2. Clue
    A single number within a sequence.
    Item
    Term
  3. Clue
    A sequence that stops after some terms.
    Item
    Finite
  4. Clue
    Sequence with a constant difference.
    Item
    AP
  5. Clue
    Sequence with a constant multiplier.
    Item
    GP
  6. Clue
    Rule giving a term straight from its position.
    Item
    Explicit
  7. Clue
    Rule that uses the earlier terms.
    Item
    Recursive
  8. Clue
    Numbers 1, 3, 6, 10, 15 formed by sums.
    Item
    Triangular
  9. Clue
    Each term is the sum of the previous two.
    Item
    Fibonacci
Instructions
Read each clue and tap the term it describes.
_Source: syllabus Mathematics, Ch 8 'Predicting What Comes Next: Exploring Sequences and Progressions'_

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An algebraic identity is true for:

  1. All values
  2. One value
  3. Two values
  4. No values
Show answer and solution

Correct answer: A. All values

1. An ordinary equation may hold for only some values. 2. An identity is stronger than that. 3. It is true for all values of the variables in it. 4. So the answer is all values. _Source: syllabus Mathematics, Ch 4 'Exploring Algebraic Identities'_

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More Mathematics topics

Sequences and ProgressionsCoordinate GeometryNumber SystemsPolynomials and Algebraic IdentitiesStatistics and ProbabilityTriangles, Circles and Geometry