Explanation

Given that the radius of a circle is increased to twice its original length

We have to find the increase in the area of the circle

Area of circle = πr²

Where r is the radius of the circle

Now, r = 2r

Area of circle = π(2r)²

= 4πr²

Last updated by NA on 27 April 2026

Explanation

A quadrilateral is a square if and only if it is both a rhombus and a rectangle (i.e., four equal sides and four equal angles)

Additional information

•  If those four equal sides also have four right angles (90), it is specifically called a Square
• A triangle that has no equal sides and no equal angles is known as a Scalene Triangle
• If two sides of a triangle are of equal length, then it is called. Isosceles triangle

Explanation

• π (pi) is approximately 3.14159.
• The value of Pi (π) is the ratio of the circumference of a circle to its diameter.
• The value of π  (pi) is an irrational number
• Meaning it is a decimal that never ends and never settles into a repeating pattern

Last updated by NA on 25-April-2026

Explanation

A quarter means 1/4.

So,

$$120÷4=30$$

$$Last\; updated\; by\; NA\; on\; 25-April-2026$$

Explanation

A quarter means one-fourth (1/4).

So, 90÷4=22.5

Last updated by NA on 25-April-2026