Area of a Geometric Flower: Solving with Variables 2x, 1.2x, and 1.5x

Question

What is the area of the flower represented in the diagram?

2x321.2x1.5x

Video Solution

Solution Steps

00:00 Find the area of the flower
00:03 The area of the flower equals the sum of the circles' areas
00:12 We'll use the formula for calculating circle area
00:24 We'll substitute this formula in the flower's area
00:43 Now we'll substitute appropriate values according to the given data and calculate to find the area
01:03 We'll solve the multiplications
01:15 We'll group the factors
01:18 And this is the solution to the question

Step-by-Step Solution

To solve this problem, we'll calculate the areas of the different circles and then add them accordingly. This approach requires determining each circle's area as follows:

  • Identify the radii of the circles given as 2x2x, 1.5x1.5x, 1.2x1.2x, constants like 3, and 2.
  • Use the circle area formula A=πr2A = \pi r^2 to calculate each circle's area.
  • Add all these areas to determine the total area of the flower shape.

Let's begin:

First Circle: Radius =2x= 2x
Area =π(2x)2=4x2π= \pi (2x)^2 = 4x^2\pi

Second Circle: Radius =1.5x= 1.5x
Area =π(1.5x)2=2.25x2π= \pi (1.5x)^2 = 2.25x^2\pi

Third Circle: Radius =1.2x= 1.2x
Area =π(1.2x)2=1.44x2π= \pi (1.2x)^2 = 1.44x^2\pi

Fourth Circle: Radius =3= 3
Area =π(3)2=9π= \pi (3)^2 = 9\pi

Fifth Circle: Radius =2= 2
Area =π(2)2=4π= \pi (2)^2 = 4\pi

Now, summing the areas in terms of π\pi, we find:

Total Area =4x2π+2.25x2π+1.44x2π+9π+4π= 4x^2\pi + 2.25x^2\pi + 1.44x^2\pi + 9\pi + 4\pi
Combine like terms:
Total Area =(4+2.25+1.44)x2π+(9+4)π= (4 + 2.25 + 1.44)x^2\pi + (9 + 4)\pi

Total Area =7.69x2π+13π= 7.69x^2\pi + 13\pi

Therefore, the area of the flower depicted in the diagram is 7.69x2π+13π 7.69x^2\pi+13\pi .

Answer

7.69x2π+13π 7.69x^2\pi+13\pi