Answer:
the first one
Step-by-step explanation:
I so understand that doesn't mean I so
AB = 24
BC = 45
AC = 51
cos C = adjacent / hypotenuse
cos C = BC / AC
cos C = 45/51
Finding an arc length requires knowing a bit about the geometry of a circle. Since the arc is a portion of the circumference, if you know what portion of 360 degrees the arc’s central angle is, you can easily find the length of the arc.
Answer:
21 cm
Step-by-step explanation:
To find the radius, half the diameter (42cm)
hope this helps :)