How do you find the area and circumference of a circle?

How do you find the area and circumference of a circle?

Diameter = 2 x Radius. Or Radius = Diameter/2. Diameter is the longest chord of the circle. Also, we can express the area and circumference of a circle with respect to the diameter. Circumference of circle = π (Diameter) Area of circle = π/4 (Diameter) 2. Radius, Diameter and Chord. We have already discussed radius and diameter of circle.

What is the distance from the center of a circle?

The length or the distance from the center of the circle to anypoint on the circle is called radius. It is denoted by ‘r’ or ‘R’. What is the relation between radius and diameter of a circle? Radius is equal to half of the diameter of the circle. If the diameter is 10 cm, then radius will be equal to 5 cm.

What is the difference between radius and circumference of a circle?

Radius of a circle is the distance between center of circle and the point on circle. Radius is half of diameter, the longest chord of circle. Circumference is the distance around the circle.

What are some solved problems on radius and chord of a circle?

Let us see some solved problems on radius and chord of a circle. Example 1: Find the radius of the circle if its diameter is 16 cm. Example 2: If the length of the chord of a circle is 8 cm and the perpendicular distance from the centre to the chord is 3 cm, then what is the radius of the circle? Let us draw a circle as per the given information.

Area of a circle: A = π r 2 = π d 2 /4 Circumference of a circle: C = 2 π r = π d. Circle Calculations: Using the formulas above and additional formulas you can calculate properties of a given circle for any given variable. Calculate A, C and d | Given r Given the radius of a circle calculate the area, circumference and diameter.

What is the diameter of a circle in math?

The diameter of a circle calculator uses the following equation: π is approximately equal to 3.14. It doesn’t matter whether you want to find the area of a circle using diameter or radius – you’ll need to use this constant in almost every case.

What is the circumference of the circle in feet?

The circumference is therefore 2 x 3.14159 x 8 = 50.26 feet. Circles are often used by architects for athletic tracks, recreational areas, buildings, and roundabouts.

What is the radius of a 16 foot circle?

For example, if the diameter is 16 feet, then the radius is 16 / 2 = 8 feet. The circumference is therefore 2 x 3.14159 x 8 = 50.26 feet. Circles are often used by architects for athletic tracks, recreational areas, buildings, and roundabouts.