7th grade IQ test

Front

What is the formula to find the circumference of a circle?

Back

The formula to find the circumference of a circle is C = d × π, where d is the diameter and π (pi) is approximately 3.14.

Front

What does 'r' represent in circle geometry?

Back

'r' represents the radius of the circle, which is the distance from the center of the circle to any point on its circumference.

Front

What is the area of a circle?

Back

The area of a circle is calculated using the formula A = π × r², where r is the radius.

Front

If the radius of a circle is 12, what is the area?

Back

The area is 452.39 square units.

Front

What is the relationship between diameter and radius?

Back

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

Front

What is the value of π (pi) approximately?

Back

π (pi) is approximately 3.14.

Front

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

Back

You can calculate the diameter using the formula d = C/π.

Front

What is the circumference of a circle with a diameter of 5?

Back

The circumference is approximately 15.7 units.

Front

What is the formula for finding the area of a circle with radius 'r'?

Back

The formula is A = π × r².

Front

If the circumference of a circle is 31.4, what is the diameter?

Back

The diameter is 10 units.