Vidaara.orgClass 8 · Mathematics
CodeVID-M08-17-PIE-01
Pie Charts, Line & Stem-Leaf - Assignment
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Section A carries 1 mark each, Section B 2 marks, Section C 3 marks and Section D 5 marks.
- Show all working for Sections B, C and D. Only final answers are given at the end — for full solutions, raise your doubts with your teacher.
Section A — Multiple Choice Questions
5 × 1 = 5 marks
1.
A pie chart shows parts of a:
- A.line
- B.whole
- C.table
- D.triangle
2.
The whole circle of a pie chart is:
- A.$180^\circ$
- B.$270^\circ$
- C.$360^\circ$
- D.$90^\circ$
3.
A line graph best shows change over:
- A.colour
- B.time
- C.area
- D.shape
4.
A stem-and-leaf plot keeps the:
- A.averages
- B.original data values
- C.angles
- D.percentages
5.
Each pie sector's angle $=$ fraction $\times$
- A.$180^\circ$
- B.$360^\circ$
- C.$90^\circ$
- D.$100$
Section B — Short Answer (2 marks)
4 × 2 = 8 marks
6.
The full angle of a pie chart is:
7.
Which graph best shows change over time?
8.
A category is half the data; its pie sector angle is:
9.
Which plot keeps the actual data values?
Section C — Short Answer (3 marks)
4 × 3 = 12 marks
10.
A category is $\tfrac14$ of the total. Find its pie-chart angle.
11.
A category has $25$ out of $100$. Find its angle.
12.
A category is $30\%$ of the data. Find its angle.
13.
In a budget pie chart, food is $120^\circ$. What fraction is that?
Section D — Long Answer (5 marks)
2 × 5 = 10 marks
14.
In a survey of $60$ people, $20$ chose tea, $25$ chose coffee and $15$ chose juice. Find the pie-chart angle for each.
15.
A monthly budget is rent $40\%$, food $30\%$, savings $20\%$, other $10\%$. Find the pie-chart angle for each.
Answer Key
Section A — Multiple Choice Questions
- (B) whole
- (C) $360^\circ$
- (B) time
- (B) original data values
- (B) $360^\circ$
Section B — Short Answer (2 marks)
- $360^\circ$.
- A line graph.
- $180^\circ$.
- A stem-and-leaf plot.
Section C — Short Answer (3 marks)
- $90^\circ$.
- $90^\circ$.
- $108^\circ$.
- $\tfrac13$.
Section D — Long Answer (5 marks)
- Tea $120^\circ$, coffee $150^\circ$, juice $90^\circ$.
- $144^\circ, 108^\circ, 72^\circ, 36^\circ$.
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