Circles Notation, Area, and Circumference

Front

What is a major arc in a circle?

Back

A major arc is an arc that is larger than a semicircle, defined by two endpoints on the circle and the longer path between them.

Front

What is the formula for the circumference of a circle?

Back

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

Front

If the circumference of a circle is 37.7 cm, what is the radius?

Back

The radius is 6 cm.

Front

What is a central angle in a circle?

Back

A central angle is an angle whose vertex is at the center of the circle and whose sides intersect the circle.

Front

What is a chord in a circle?

Back

A chord is a line segment with both endpoints on the circle.

Front

What is the formula for the area of a circle?

Back

The area (A) of a circle is calculated using the formula: A = πr^2, where r is the radius.

Front

If the radius of a circle is 5 cm, what is the circumference?

Back

The circumference is 31.4 cm.

Front

What is a tangent in relation to a circle?

Back

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

Front

What is a secant in relation to a circle?

Back

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

Front

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

Back

The diameter (d) is twice the radius (r): d = 2r.