Question

4. The radius of a circle is 4cm. What will be its diameter?
O (A) 4cm
(B) 2cm
O (C) 8cm
O (D) 16cm​

Answer 1

Answer :-

• Option C is correct.

• The diameter of the circle is 8 cm.

Given :-

• The radius of a circle is 4 cm.

To find :-

• It's diameter.

Step-by-step explanation :-

• Here, the radius of a circle has been given to us. We have to find it's diameter.

We know that :-

$\underline{\boxed{\sf Diameter = 2 \times Radius}}$

Here,

• Radius = 4 cm.

------------------------------

Hence,

$\rm Diameter = 4 \times 2$

Multiplying 4 with 2,

$\overline{\boxed{\rm Diameter = 8 \: cm}}$

• So, the diameter of the circle = 8 cm.

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Know more :-

What is a circle?

• A circle is a round figure which has no vertices, edges or faces. It consists of radii, chords, a diameter and a circumference. Infinite lines can be drawn inside a circle.

What is the centre and radius of a circle?

• The fixed point is called the centre and the constant distance from the centre is called the radius.

What is the diameter of a circle?

• The longest chord of a circle is called its diameter.

Answer 2

Answer:

8 cm

Step-by-step explanation:

diameter = 2× Radius

= 2×4

=8