Unit 3.2, Review

Front

What is the definition of a radius in a circle?

Back

The radius of a circle is the distance from the center of the circle to any point on its circumference.

Front

How do you calculate the radius if you know the diameter?

Back

The radius is half of the diameter. Formula: r = d/2.

Front

What is the relationship between the radius and 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

What is the formula for the area of a circle in terms of the radius?

Back

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

Front

What is the measure of a right angle in degrees?

Back

A right angle measures 90 degrees.

Front

What is the sum of the angles in a triangle?

Back

The sum of the interior angles in a triangle is always 180 degrees.

Front

How do you identify the center of a circle?

Back

The center of a circle is the point that is equidistant from all points on the circumference.

Front

What is the definition of 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 the relationship between the angles in a right triangle?

Back

In a right triangle, one angle is 90 degrees, and the sum of the other two angles is 90 degrees.

Front

What is the definition of an inscribed angle?

Back

An inscribed angle is formed by two chords in a circle which have a common endpoint.