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CIRCLES

CIRCLES. SECTION 10-1. JIM SMITH JCHS. DEFINITION. A CIRCLE IS A SET OF POINTS EQUIDISTANCE FROM A GIVEN POINT CALLED THE CENTER. PARTS OF A CIRCLE. CENTER. A. PARTS OF A CIRCLE. RADIUS RADII. DISTANCE FROM CENTER TO CIRCLE. PARTS OF A CIRCLE. CHORDS. ENDPOINTS ARE

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CIRCLES

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  1. CIRCLES SECTION 10-1 JIM SMITH JCHS

  2. DEFINITION A CIRCLE IS A SET OF POINTS EQUIDISTANCE FROM A GIVEN POINT CALLED THE CENTER .

  3. PARTS OF A CIRCLE CENTER A

  4. PARTS OF A CIRCLE RADIUS RADII DISTANCEFROM CENTER TO CIRCLE

  5. PARTS OF A CIRCLE CHORDS ENDPOINTS ARE ON THE CIRCLE

  6. PARTS OF A CIRCLE DIAMETER CHORD THAT CONTAINS THE CENTER A

  7. PARTS OF A CIRCLE d = 2r r = d / 2 A

  8. B DIAMETERS OF CIRCLES A, B, and C ARE 14, 20, and 10 C A X Y FIND XB FIND BY

  9. C A X Y B FIND XB XB = AB- AX XB = 10 – 7 XB = 3 FIND BY BY = BC – CY BY = 10 – 5 BY = 5

  10. CIRCUMFERENCE C = 2 π r or C = d π • FIND C if r = 7 • C = 2 π 7 • C = 14 π or 43.96 • FIND C if d = 12 • C = 12 π or 37.68

  11. 5 5 FIND THE CIRCUMFERENCE EXACT ANSWER NEAREST TENTH

  12. 5 5 45,45,90 TRIANGLE d = 5√2 EXACT ANSWER C = 5√2π NEAREST TENTH C = 22.2

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