<u>Given</u>:
The given triangle ABC is a right angled triangle.
The length of AC is 4 units.
The measure of ∠B is 20°
We need to determine the length of BC.
<u>Length of BC:</u>
The length of BC can be determined using the trigonometric ratio.
Thus, we have;

From the figure, the side opposite to the angle is AC and adjacent is BC.
Substituting opp = AC and adj = BC, we get;

Substituting AC = 4, we have;

Simplifying, we have;



Thus, the length of BC is 10.99 units.
Answer:
The remaining 15 athletes did not participate in any type of flexibility program
Perpendicular lines are two lines which meet at a right angle
The graph would intersect at (0, -4) and have a slope of 1.