Page 368 - Start Up Mathematics_8 (Non CCE)

Section C

3. Fill in the blanks: 1 M × 5 = 5 M
(a) __________ of a simple closed figure is the sum of all the sides.
(b) The length of the diagonal of a cube is __________ units.
(c) There are two types of class intervals — __________ and __________.
(d) A __________ is a pictorial representation of numerical data in a circle divided into sectors.
(e) For any event P(A) + P(A) = __________.

Section D

4. Give one word or sentence for the following: 1 M × 5 = 5 M
(a) Write the Heron’s formula for finding area of triangle.
(b) Define volume.
(c) Define discrete data.
(d) What is a histogram?
(e) Define a random experiment.

Section E

5. Find the area levelled by a cylindrical roller of diameter 60 cm and length 2.1 m in 150 revolutions.
2 M
6. Represent the following data by a pie chart: 3 M

Transport to school Walk Bus Bicycle Metro Car
Number of students 400 1,000 200 300 100

Project Work

Frequency Distribution and Bar Graph

Conduct a survey to find out the weekly pocket money (in `) of students in your class. Construct a
frequency table with suitable class intervals. Also, make a bar graph.

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