Answer:
Angle
= (bigArc - smallArc)/2
Step-by-step explanation:
Draw a circle and put a point outside the circle. Draw two lines from the point. They are secants if they both touch the circle twice. See image.
The secants cut off a Big Arc and a Small Arc. The angle is the (BigArc - SmallArc) and then ÷ 2.
see image.
They could have assembled total 336 different possible crews.
<em><u>Explanation</u></em>
Total number of trained pilots is 9 and geologists is 4.
The crew should be consisted of 2 pilots and 1 geologist. That means, <u>2 pilots are chosen from total 9 and 1 geologist is chosen from total 4</u>.
Number of ways for choosing 2 pilots from 9 and
Number of ways for choosing 1 geologist from 4
So, the total possible number of different crews they could have assembled