A secant is a straight line segment that joins two points on the circle.

a. True
b. False

The circumference of a circle is equal to pi times the diameter or two pi times the radius.

a. True
b. False

A radian is a central angle that cuts off (intercepts) an arc that is equal to the length of the radius of the circle.

is sm1it07_ch25.27m is sm1it07_ch25.21m sm1it07_ch25.21m In the diagram shown, determine the number of degrees in 2 1 when are BC = 64 12' and are AC - 56 8: BD and AC are chords inside the circle. Use the figure shown. Determine the measure of 2 1 when the length of are ABC = 5.170 ft. Round the answer to four significant digits Use the figure shown. Determine the measure of 4 1 when the length of are ABC = 5-170 ft. Round the answer ificant digits. 1.750 ft 1.750 ft RADIUS RADIUS a 60+10 O b. 90-14 a. 180.8 8. 180.8" c. 66 12 O b. 190.7 b. 190.79 O d. 60'10 O c. 70.90 O c. 70.9 O d. 192.5 d. 192.5 O- Ican Key 8. O 9. O Determine the length of OC in the diagram shown. Points E, F, and G are tangent points. Round your answer to four significant dig Determine the length of OA in the diagram shown. Points E, F, and G are tangent points. Round your answer to four significant digits. 10. C 19.68 cm 11. E RADIUS 19.68 cm 86.63 cm E RADIUS 12. 86.63 cm 13. 14. A G B 15. 67.79 cm - A 67.79 cm G - 97.33 cm - 97.33 cm 16. a. 35.50 cm a. 70.59 cm 17. O b. 18.40 cm b. 94.61 cm 18. O c. 27.24 cm c. 69.66 cm 19 d. 29.66 cm O d. 18.40 cm Determine the length of the belt required to connect the two pulleys shown in the following diagram. Roun sm1it07_ch25.23m the answer to 1 decimal place. In the diagram shown, determine are degrees for BC when