Unit Eight Review - Circles

Front

What is the measure of angle DAF if m∠DAF = 130°?

Back

The measure of angle DAF is 130°.

Front

If x = 6.5, what does this value represent in a geometric context?

Back

The value of x could represent a length, radius, or other measurement depending on the context of the problem.

Front

How do you calculate the perimeter of a quadrilateral?

Back

To calculate the perimeter of a quadrilateral, sum the lengths of all four sides.

Front

If x = 26, what could this value represent in a circle-related problem?

Back

The value of x could represent a radius, diameter, or another measurement related to the circle.

Front

What is the formula for the circumference of a circle?

Back

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

Front

What is the formula for the area of a circle?

Back

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

Front

How do you round a number to the nearest tenth?

Back

To round a number to the nearest tenth, look at the hundredths place; if it's 5 or more, round up.

Front

What is the approximate circumference of a circle with a radius of 12 ft?

Back

Using the formula C = 2πr, the circumference is approximately 75.4 ft when rounded to the nearest tenth.

Front

What is the approximate area of a circle with a radius of 12 ft?

Back

Using the formula A = πr², the area is approximately 452.4 ft² when rounded to the nearest tenth.

Front

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

Back

The diameter is twice the length of the radius (D = 2r).