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Gyaan Maths
CBSE · Class 6-12
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Class 8 · Ganita Prakash
Unit 12 · Class 8Ganita Prakash
Tales by Dots and Lines
Graphs, line graphs, and data visualisation.
Lessons
3 concepts
1
Line Graphs
Best for trends over time. Points
(
t
,
y
)
(t, y)
(
t
,
y
)
joined by segments. Read intersections carefully.
2
Pie Charts
Central angle for category
=
(
value
/
total
)
×
360
°
= (\text{value}/\text{total}) \times 360°
=
(
value
/
total
)
×
360°
. Sum of angles =
360
°
360°
360°
.
3
Reading Graphs
Always check axes, labels, and units. Look for peaks, dips, trends.
Skills to practise
Skill · medium
Tales by Dots and Lines — Practice