Select the angle that correctly completes the law of cosines for this triangle. 72 + 252 - 2(7)(25)cos.
242
25
16°
90°
24
O A. 180°
• B. 16°
• C. 74°
O D. 90°

Acentral angle measuring 160 degrees intercepts an arc in a circle whose radius is 4. what is the length of the arc the circle formed by this central angle? round the length of the arc to the nearest hundredth of a unit. a) 4.19 units b) 6.28 units c) 12.57 units d) 12.57 square units