Question

Q7. A circle has a radius 7 cm. Find the
length of the longest chord of this
circle.

21 cm
7 cm
14 cm

3.5 cm​

Answer 1

Answer:

Step-by-step explanation:

ANSWER:-

Concept:-

• The longest chord of a circle is the Diameter of a circle.
• The diameter is double the radius of the circle.

Let's solve!

• Radius of circle is 7 cm
• It already stated that:-

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

$\sf{Diameter = 2 \times 7}$

So, the longest chord of circle is 14 cm long. Hence 3rd part is the answer.

And Note that:-

• 2 ×pie×r is the perimeter or circumference of the circle.

• So , if perimeter is given, we can find the radius from that also.

• Also, area of a circle is pie × r²

• The value of pie is 22/7 or 3.14 units given in the question.

Answer 2

Radius of circle is 7 cm

given that:-

{Diameter = 2 \times Radius}

Diameter =2×Radius

{Diameter = 2 \times 7}

Diameter = 2×7

Diameter = 14

from there we come to know that the longest chord of circle is 14 cm long.