Parallelogram Area with 4:1 Height Ratio: Express in Terms of 2X

Question

Look at the parallelogram in the figure below.

The length of the height and side AB have a ratio of 4:1.

Express the area of the parallelogram in terms of X.

2X2X2XAAABBBCCCDDD

Video Solution

Solution Steps

00:00 Express the area of the parallelogram using X
00:04 The height to side ratio according to the given data
00:13 Substitute the height value according to the given data and solve to find expression AB
00:21 Isolate AB
00:41 This is the expression for side AB
00:53 Use the formula for calculating parallelogram area (side times height)
01:07 Substitute appropriate values according to the given data, and solve to find the area
01:17 Simplify what's possible
01:25 And this is the solution to the question

Step-by-Step Solution

To find the area of the parallelogram, we first use the given ratio of 4:1 between the height and side AB AB . This tells us that if side AB AB is 2X 2X , then the height must be four times smaller, because we are considering the ratio in terms of the order given heightAB=4:1 \frac{\text{height}}{\text{AB}} = 4:1 .

Given side AB=2X AB = 2X , the height of the parallelogram is:

height=14×2X=12X \text{height} = \frac{1}{4} \times 2X = \frac{1}{2}X .

Now, we calculate the area of the parallelogram using the formula:

Area=base×height \text{Area} = \text{base} \times \text{height} .

Here, base = 2X 2X , and height = 12X \frac{1}{2}X .

Thus,

Area=2X×12X=X×X=X2 \text{Area} = 2X \times \frac{1}{2}X = X \times X = X^2 .

Therefore, the area of the parallelogram is x2 x^2 .

Answer

x2 x^2