Circumference Calculations and Formulas

The video tutorial teaches how to calculate the perimeter of circles with different shapes, including 3/4, 1/4, and half circles. It provides step-by-step examples using specific formulas and explains when to use different values for π. The tutorial encourages viewers to engage with the content by liking, subscribing, and sharing.

What are the two basic formulae for calculating the circumference of a circle?

• k = 2 * v * D or K = V * R

• k = v * R or K = 2 * V * D

• k = V * D or K = 2 * R * V

• k = v * D or K = 2 * V * R

In the formula k = 2 * V * R, what does 'R' represent?

• Diameter

• Circumference

• Radius

• Area

How do you calculate the circumference of a 3/4 circle?

• 3/4 * V * R + 2R

• 3/4 * 2 * V * D + 2D

• 3/4 * V * D + 2D

• 3/4 * 2 * V * R + 2R

If the radius of a circle is a multiple of 7, which value of V should be used?

• 3.14

• 7/22

• 22/7

• 3.14159

What is the circumference of a 3/4 circle with a radius of 7 cm?

• 14 cm

• 22 cm

• 33 cm

• 47 cm

How do you calculate the circumference of a 1/4 circle?

• 1/4 * V * R + 2R

• 1/4 * 2 * V * D + 2D

• 1/4 * V * D + 2D

• 1/4 * 2 * V * R + 2R

What is the circumference of a 1/4 circle with a radius of 10 cm?

• 21.57 cm

• 15.7 cm

• 47 cm

• 36 cm

How do you calculate the circumference of a half circle with a dashed line?

• 1/2 * V * R

• 1/2 * V * D

• 1/2 * V * D + D

• 1/2 * 2 * V * R

What is the circumference of a half circle with a diameter of 10 cm?

• 15.7 cm

• 21.57 cm

• 36 cm

• 47 cm

What is the circumference of a half circle with a solid line and a diameter of 14 cm?

• 21.57 cm

• 47 cm

• 36 cm

• 15.7 cm