A news article reports that students who take SAT preparation courses tend to have higher test scores. Which of the following describes an omitted variable that could explain this correlation? I. Parents with more education are more likely to enroll their children in SAT preparation Courses. II. SAT preparation courses improve students' test-taking abilities. III. Students who are more motivated to attend college are more likely to enroll in SAT preparation courses. Multiple Choice I only I, II, and II Il and II only I and III only
Angles in Circles
Angles within a circle are feasible to create with the help of different properties of the circle such as radii, tangents, and chords. The radius is the distance from the center of the circle to the circumference of the circle. A tangent is a line made perpendicular to the radius through its endpoint placed on the circle as well as the line drawn at right angles to a tangent across the point of contact when the circle passes through the center of the circle. The chord is a line segment with its endpoints on the circle. A secant line or secant is the infinite extension of the chord.
Arcs in Circles
A circular arc is the arc of a circle formed by two distinct points. It is a section or segment of the circumference of a circle. A straight line passing through the center connecting the two distinct ends of the arc is termed a semi-circular arc.
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