🧩🔁🎯U6 (Circles) Flashcardizz Review

Front

What is the measure of an angle in a circle when given two intersecting chords?

Back

The measure of the angle formed by two intersecting chords is equal to half the sum of the measures of the arcs intercepted by the angle.

Front

How do you calculate the area of a sector in a circle?

Back

The area of a sector can be calculated using the formula: Area = (θ/360) * πr², where θ is the central angle in degrees and r is the radius.

Front

What is the relationship between the radius and the circumference of a circle?

Back

The circumference of a circle is calculated using the formula: C = 2πr, where r is the radius.

Front

How do you find the measure of an angle formed by two tangents drawn from a point outside a circle?

Back

The measure of the angle formed by two tangents drawn from a point outside the circle is equal to half the difference of the measures of the intercepted arcs.

Front

What is the formula for the area of a circle?

Back

The area of a circle is calculated using the formula: A = πr², where r is the radius.

Front

How do you find the length of an arc in a circle?

Back

The length of an arc can be calculated using the formula: Arc Length = (θ/360) * 2πr, where θ is the central angle in degrees and r is the radius.

Front

What is the definition of a tangent to a circle?

Back

A tangent to a circle is a line that touches the circle at exactly one point and is perpendicular to the radius at that point.

Front

How do you determine the area of a circle given its circumference?

Back

To find the area of a circle given its circumference, first use the formula C = 2πr to find the radius, then use A = πr² to find the area.

Front

What is the measure of an inscribed angle in a circle?

Back

The measure of an inscribed angle is half the measure of the intercepted arc.

Front

How do you find the value of x in a tangent-secant problem?

Back

In a tangent-secant problem, use the formula: (tangent length)² = (secant length) * (external segment length) to find the value of x.