9.6 circles

HW pg. 489 #3­16, 20 1

April 03, 2012

Objective: Circles

Solve.

10 x100 360

0.8 x5.3 360

=

=

Bellwork

9.6 circles

HW pg. 489 #3­16, 20 2

April 03, 2012

Page 482 # 1­ 32 all

8. ED10. CB or 4mm12. ΔEDF14. <A ≅ <C ≅ <M ≅ < K <E ≅ <D ≅ <I ≅ <J <B ≅ <H ≅ <L ≅ < F16. 10 in18. DF ≅ SF, EF ≅ TF, <DFE ≅ <SFT, ΔDFE ≅ ΔSFT by SAS20. <A ≅ <X, <B ≅ <Y, <C ≅ <Z22. 15 cm24. <YZB ≅ <XZB, BZ ≅ BZ, <YBZ ≅ <XBZ, ΔYBZ ≅ ΔXBZ by ASA26. AC ≅ CA, AB ≅ CD, BC ≅ DA, ΔABC ≅ ΔCDA by SSS28. Incorrect; <R does not correspond with <U30. Correct; these are corresponding sides32. Correct; these are corresponding angles.

9.6 circles

HW pg. 489 #3­16, 20 3

April 03, 2012

Circle

Radius

Circumference

Diameter

Chord

radius

chord

diameter

center

9.6 circles

HW pg. 489 #3­16, 20 4

April 03, 2012

Circumference: C = πd or 2πr

Find the circumference.

6 ftC = π6 = 18.84 ft

9.6 circles

HW pg. 489 #3­16, 20 5

April 03, 2012

Find the circumference of each circle.

diameter = 200 mi radius = 30 mm

C = π200 = 628 mi C = 2π30 = 188.4 mm

9.6 circles

HW pg. 489 #3­16, 20 6

April 03, 2012

Make a circle graph for Juan's weekly budget.

Recreation (r) 20%Lunch (l) 25%Clothes (c) 15%Savings (s) 40%

20%

25%

15%

40%

9.6 circles

HW pg. 489 #3­16, 20 7

April 03, 2012

Make a circle graph for the data below.

Visits to Kentucky's NationalRecreation AreasSite Visits(millions)Lincoln's Birthplace 0.3Big South Fork 0.4Cumberland Gap 1.3mammoth Caves 1.8

9.6 circles

HW pg. 489 #3­16, 20 8

April 03, 2012

9.6 HW pg. 489 # 3‐16, 20