الدائرة: إيجاد محيط الدائرة - مسائل

The video tutorial explains how to calculate the perimeter of circles using both the radius and diameter. It begins with an introduction to the concept of circle perimeter and then demonstrates the calculation using a given radius of 2.5 cm, resulting in a perimeter of 15.71 cm. The tutorial then shifts to using a diameter of 16 feet to find the perimeter, which is calculated as 50.26 feet. Both results are rounded to the nearest hundredth.

What is the formula to calculate the perimeter of a circle when the radius is given?

• Perimeter = π × diameter

• Perimeter = 2 × π × radius

• Perimeter = π × radius

• Perimeter = 2 × radius

If a circle has a radius of 2.5 cm, what is its perimeter rounded to the nearest hundredth?

• 15.00 cm

• 15.71 cm

• 16.00 cm

• 14.00 cm

What is the formula to calculate the perimeter of a circle when the diameter is given?

• Perimeter = 2 × π × radius

• Perimeter = 2 × diameter

• Perimeter = π × diameter

• Perimeter = π × radius

If a circle has a diameter of 16 feet, what is its perimeter rounded to the nearest hundredth?

• 49.00 feet

• 50.26 feet

• 50.00 feet

• 51.00 feet

Which of the following is true about the perimeter of a circle?

• It is calculated using the formula π × diameter when the diameter is known.

• It is the same as the area of the circle.

• It is always twice the radius.

• It is half the diameter.