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# Circles formulas for math 3

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### Circles formulas for math 3

1. 1. CIRCLES! W H A T F O R M U L A S D O Y O U N E E D T O K N O W ?
2. 2. T H A N K S T O T H E A W E S O M E W E B S I T E W W W . R E G E N T S P R E P . O R G , F O R T H E S E W O N D E R F U L E X P L A N A T I O N S ! In Module 9, we will be learning all about Circles. • Arcs (Major, Minor, Semi-circle) • Chords (Segments) • Sectors • Angles • Tangents and Secants There are a few formulas that will help us along the way. Let’s take a look at those now.
3. 3. C E N T R A L A N G L E S H A V E T H E I R V E R T E X A T T H E C E N T E R O F T H E C I R C L E !
4. 4. I N S C R I B E D A N G L E S H A V E T H E I R V E R T E X O N T H E C I R C L E .
5. 5. T H I S I S O N E O F T H E A N G L E S W I T H T H E V E R T E X O N T H E C I R C L E , B U T B O T H C H O R D S A R E N O T I N T H E C I R C L E .
6. 6. T H E S E A N G L E S H A V E T H E I R V E R T E X I N T H E C I R C L E
7. 7. T H E S E A N G L E S H A V E T H E I R V E R T E X O U T S I D E T H E C I R C L E .
8. 8. T H E S E A N G L E S H A V E T H E I R V E R T E X O U T S I D E T H E C I R C L E .