Circle Vocabulary

Published on Nov 18, 2015

Circle Vocabulary

PRESENTATION OUTLINE

CIRCLE

VOCABULARY

DIAMETER

A CHORD THROUGH THE CENTER

RADIUS

A LINE SEGMENT CONNECTING THE CENTER OF A CIRCLE TO A POINT ON THE CIRCLE

SEMICIRCLE

HALF OF A CIRCLE

CENTRAL ANGLE

AN ANGLE WHOSE VERTEX IS AT THE CENTER OF A CIRCLE
Photo by bradleygee

ARC LENGTH

THE LENGTH OF THE CURVE INTERSECTED BY A CENTRAL ANGLE
Photo by markkilner

MAJOR ARC

ARCS THAT ARE LARGER THAN A SEMICIRCLE
Photo by Sam Ilić

MINOR ARC

ARCS THAT MEASURE LESS THAN A SEMICIRCLE

TANGENT LINE

A LINE THAT TOUCHES A CIRCLE AT ONLY ONE POINT

SECTOR OF A CIRCLE

A FRACTIONAL PART OF A CIRCLE'S AREA CONTINING A CENTRAL ANGLE
Photo by sofiaglynyana

SECANT LINES

LINES THAT INTERSECT A CIRCLE AT TWO POINTS

CONCENTRIC CIRCLES

CIRCLES WITH THE SAME CENTER

EXTERNALLY TANGENT

CIRCLES THAT TOUCH AT ONE POINT BUT SHARE NO INTERIOR AREA

INTERNALLY TANGENT

CIRCLES THAT TOUCH AT ONE POINT AND SHARE INTERIORS
Photo by hermitsmoores

SPHERE

A 3-D FIGURE FORMED BY POINTS EQUIDISTANT FROM A CENTER POINT.
Photo by blair_25

chord

A segment that connect two points on a circle

Nancy Trent

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