Question

I will mark brainliest if you give the correct answer ​

Answer 1

Answer:

7 (b)

Thus, the perimeter and the area of a rectangle is given by: The formula for the Area of a Rectangle. Area of a Recetangle. A = l × b. The area of any rectangle is calculated, once its length and width are known.

7(d)

Area of circle formula = π × r2. The area of a circle is π multiplied by the square of the radius. The area of a circle when the radius 'r' is given is πr2. The area of a circle when the diameter 'd' is known is πd2/4. π is approx 3.14 or 22/7. Area(A) could also be found using the formulas A = (π/4) × d2, where 'd' is the radius and A= C2/4π, where 'C' is the given circumference.

7(c)

The area of that figure is twice the area of the circle. ... Since the area of that rectangle is twice the area of the circle, then the area of the circle is half the base times the height. It will be half of 2πr· r. The area of the circle will be πr2.

7(a)

Let L and B are the length and breadth of the original rectangle and L and B ′

length and breadth of new rectangle.

Then

Area of original rectangle =L×B

L = 21 L and B;=2B

Now, Area of new rectangle =L×B= 21

L×2B=L×B= Area of original rectangle

∴ The given statement is true.