Circles Flashcard Review

Front

What is a major arc in a circle?

Back

A major arc is an arc that measures more than 180 degrees. For example, arc JLH is a major arc.

Front

What is the total number of degrees in a circle?

Back

360 degrees.

Front

What is the measure of a right angle?

Back

90 degrees.

Front

What is the measure of a straight angle?

Back

180 degrees.

Front

What is the relationship between the angles formed by a tangent and a secant that intersect outside a circle?

Back

The angle formed is equal to half the difference of the measures of the intercepted arcs.

Front

If x = 80º, what is the measure of the angle formed by the intercepted arcs?

Back

80 degrees.

Front

What is the measure of angle 'x' if it is formed by a tangent and a secant?

Back

The measure of angle 'x' can be calculated using the formula: (Arc1 - Arc2) / 2.

Front

What is the definition of a tangent to a circle?

Back

A tangent is a line that touches the circle at exactly one point.

Front

What is the definition of a secant line?

Back

A secant line is a line that intersects a circle at two points.

Front

What is the measure of angle '?' if the options are 70º, 90º, 105º, and 210º?

Back

The measure of angle '?' is 105 degrees.