Question

if the radius of a circle is 2.5cm.what its diameter? With process.

Answer 1

Answer:

5cm

Step-by-step explanation:

Given,

• Radius = 2.5 cm

To find,

• Diameter

Knowledge required,

• Diameter = 2 × Radius

Diameter = 2 × 2.5 cm = 5 cm.

Mensuration formulas about circle :

• Area of sector =½rl
• Area of circle = πr²
• Circumference(perimeter) = 2πr

Where,

r = radius & l = arc length

Answer 2

Answer : 5 cm

Given : the radius of a circle is 2.5cm.

To find : The diameter of the circle

Solution : Diameter = 2 × Radius

Radius = Diameter / 2

So therefore , Diameter = 2 × 2.5

Diameter = 5.0 cm

Relevant information :

• Circle can be defined as a figure in which we draw points with a fixed distance from its centre .
• The fixed point in the centre is called the centre of the circle .
• The fixed distance from the centre point is called the radius of a circle .
• The diameter is twice of its radius as Diameter is the longest chord of a circle passing through its centre .
• The perimeter of a circle or the length of it's boundary is called circumference .
• Chord is a line segment that passes through the circle on two points .
• Segment is the portion between the arc and the chord .
• Arc is a part of the circumference of the circle .
• Tangent is a line that touches circle on only one point .
• Sector is the portion of a circle resembling a piece of cake .