Page 55 - Focus SPM 2022 - Additional Mathematics

Chapter Learning Area : Geometry
Form 5
1 Circular Measure

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Concept
Map

Navigator
Watchmaker

Astronomer
Professions
involving circular
measure

Aeroplane designer

Architect
KEYWORDS

• Angle subtended – Sudut tercangkum
• Arc length – Panjang lengkok
• Area of sector – Luas sektor
• Chord – Perentas
• Degree – Darjah
• Radian – Radian
• Radius – Jejari
A variety of professions involve angle measurements as well as the calculation of the length of
• Segment – Tembereng

• A watchmaker determines the position of the gear component in the watch.
arc and the area of sector of a circle. For example,
• An astronomer uses space telescopes with the suitable angular resolution.
• An aeroplane designer measures the depth size of the circular shape of the plane.

What are some examples of other fields of profession that apply the concept of circular measure?
• An architect draws an arc with suitable angle when designing a house.
• A navigator uses sextant for navigation.

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