Geometry chapter 9 section 2
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Geometry Chapter 9 Section 2. Arcs and Angles. Central Angle. An angle with the center point as the vertex. Minor Arc. G. Minor Arc. Name a Minor Arc with its two endpoints. J. Major Arc. G. Major Arc. J. Name a Major Arc with an endpoint, a point on the circle and another endpoint.

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Central angle
Central Angle

  • An angle with the center point as the vertex


Minor arc
Minor Arc

G

Minor Arc

Name a Minor Arc with its two endpoints

J


Major arc
Major Arc

G

Major Arc

J

Name a Major Arc with an endpoint, a point on the circle and another endpoint

K


Arc

  • Measure of an arc = the measure of the degrees of the central angle that intercepts that arc


Angle EWF = 380

Arc EF = 380

Arc EGF = 3600 - 380

F

E

W

J

G


Angle EWF = 380

GF is a Diameter

Find arc EW

Find arc GJE

F

E

W

J

G


JF = 2(EF) – 5

JG = 2(EF)

EG = 2(JG)

Find EF

F

E

W

J

G


Concentric circles
Concentric Circles

  • 2 circles 1 center point



Arc length
Arc Length

  • The distance of an arc






Do now
Do Now

  • Page 455 problems 19 - 42


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