Areas Of Sector And Segment Of A Circle
Chapter Name : Areas Related To Circles |
Sub Topic Code : 104_10_12_03_01 |
Topic Name : Areas Of Sector And Segment Of A Circle |
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Sub Topic Name : Areas Of Sector And Segment Of A Circle |
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Introduction
A sector is a slice of a circle; a sector is a part of the circle not attached to the center.
Pre-Requisites:
Angles, basic trigonometric functions
Activity:
Cutting a pizza with respect to center will give you a sector, pulling off a piece from the edge without affecting the center will give you a segment.
Real Life Question:
Does knowledge of calculating areas of parts of a circle help in finding costs of building constructions?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Circumference | The length of the outline of a circle (perimeter). |
| Sector | A slice from the circle connected to the center. |
| Segment | A part of the circle not attached to the center. |
| Trigonometric functions | Relationships between different sides and angles of a triangle. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Pizza | Both secant and sector can be observed. |
Real life uses :
Calculating costs of construction.
Practical examples around us
| Examples | Explainations |
|---|---|
| Cake | Dividing a cake among a group can be done by either dividing it into sectors or segments. |
What you learn in Theory:
Concepts about a circle’s sector and segment.
What you learn in Practice:
How to calculate the area of a circle’s sector and segment.