Circle.

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Presentation transcript:

Circle

identifying circles 1 going outside  not a circle staying within  circle

identifying circles 2 Circle? no yes

parts of a circle 1 radius radius radius center radius radius radius

parts of a circle 2 diameter chord chord chord diameter chord diameter Which chords pass through the center? they are special chords

parts of a circle 3 Diameter, or just a chord? chord diameter

parts of a circle 4 semicircle arc Which arcs they are special arcs are exactly half of the circle? they are special arcs

Semicircle, or just an arc? parts of a circle 5 Semicircle, or just an arc? semicircle arc

parts of a circle 6 Which arcs are less than major arcs half of the circle? major arcs minor arcs Which arcs are more than half?

parts of a circle 7 radius center major arc chord minor arc radius

parts of a circle 8 Major arc, or minor? minor major

parts of a circle 9 radius semicircle diameter semicircle radius 1 diameter = 2 radii 1 circle = 2 semicircles

parts of a circle 10 sector minor sectors Which sectors are Minor and major sectors minor sectors Which sectors are smaller than half of the circular area? Which sectors are bigger than half of the circular area? major sectors Which sectors are exactly half of the circular area?

parts of a circle 11 Major sector, or minor? minor major

Which segments are exactly half of the circular area? parts of a circle 12 segment Segments – minor and major minor segments Which segments are smaller than half of the circular area? Which segments are bigger than half of the circular area? major segments Which segments are exactly half of the circular area?

parts of a circle 13 Major segment, or minor? minor major

parts of a circle 14 radius major sector ­center major arc chord minor arc minor sector radius

parts of a circle 14 minor segment major arc chord major segment minor arc

parts of a circle 14 Sector, or segment? segment sector

parts of a circle 15 sector segment radius diameter semicircle Semicircular sector = segment radius segment 1 circular area = 2 sectors 1 circular area = 2 segments