Solve Parallelogram: Lengths X & Y, Angle Z, A=15in, B=20.5in

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In summary, a parallelogram with a 90° angle exists within a rectangle measuring 15 inches tall by 20.5 inches wide. To solve for lengths X and Y and angle Z of the parallelogram, we can use the area of the parallelogram and deconstruct the area of the rectangle into two right triangles and the parallelogram. By using Pythagoras, we can find an equation with only one unknown and solve for X and Y.
  • #1
Storminnorman
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A parallelogram exists within a rectangle which measures 15 inches tall by 20.5 inches wide.

A=15 inches
B=20.5 inches
C=1.5 inches
(C makes a 90° angle with X)

Solve for lengths X and Y and angle Z of the parallelogram and please tell me how you did it!

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  • #2
Hello and welcome to MHB, Storminnorman! :D

We ask that our users show their progress (work thus far or thoughts on how to begin) when posting questions. This way our helpers can see where you are stuck or may be going astray and will be able to post the best help possible without potentially making a suggestion which you have already tried, which would waste your time and that of the helper.

I think the way I would begin is to observe that the area of the parallelogram is:

\(\displaystyle A_P=1.5X\)

And then we can deconstruct the area of the rectangle into 2 right triangles and the parallelogram:

\(\displaystyle AB=(B-Y)A+1.5X\)

Now, by Pythagoras, we find:

\(\displaystyle B-Y=\sqrt{X^2-A^2}\)

Hence:

\(\displaystyle AB=A\sqrt{X^2-A^2}+1.5X\)

Now you have an equation with only one unknown...can you proceed?
 

Related to Solve Parallelogram: Lengths X & Y, Angle Z, A=15in, B=20.5in

1. What is a parallelogram?

A parallelogram is a four-sided shape with two pairs of parallel sides. The opposite sides of a parallelogram are equal in length and the opposite angles are equal in measure.

2. How do you find the lengths of X and Y in a parallelogram?

The lengths of X and Y can be found by using the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (the longest side) is equal to the sum of the squares of the other two sides. In a parallelogram, X and Y are the two sides that form the right angle, so we can use the formula c² = a² + b² to find their lengths.

3. What is the measure of angle Z in a parallelogram?

The measure of angle Z in a parallelogram can be found by using the fact that opposite angles in a parallelogram are equal. So, if we know the measure of one angle, we can simply use the fact that the opposite angle is also equal to find the measure of angle Z.

4. What is the formula for the area of a parallelogram?

The formula for the area of a parallelogram is A = base x height, where the base is the length of one of the parallel sides and the height is the distance between the parallel sides.

5. How do you solve for X and Y in a parallelogram if the lengths of the other sides are given?

In order to solve for X and Y, we can use the fact that opposite sides in a parallelogram are equal in length. So, if we know the lengths of the other two sides, we can simply set up an equation where X and Y are equal to those lengths and solve for the missing values.

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