'Angle arc' diaporamas de présentation

Warm Up Section 4.5 Find x : 1. 2. 3.

Warm Up Section 4.5 Find x : 1. 2. 3. 4. 5. 6. x o. 32 o. x o. 70 o. x o. x. 12. 45 o. 100 o. x o. x o. Answers to Warm Up Section 4.5 Find x :

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Warm up

Warm up. 30 ?. 8 0 ?. 100 ?. 180 ?. 100 ?. 260 ?. Wheel of Formulas!!. Central Angle. Angle = Arc. Inscribed Angle. Angle where the vertex is ON the circle. Inscribed Angle. 160 ?. The arc is twice as big as the angle!!. 80 ?. Find the value of x and y. 120 ?. ?. 120 ?. x.

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Section 10.4

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ARCS

ARCS. arc. The length of an arc is proportional to the size of the angle at the middle, x °. x °. Ex1. arc. 90 ° is quarter of a full turn. so arc = 44cm  4 = 11cm. Circumference = 44cm. For more difficult angles we can cross-multiply as follows…. Ex2. arc. Angle = arc.

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