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Jacob is cutting a tile in the shape of a parallelogram. Two opposite angles have measures of [tex]\((6n-70)^\circ\)[/tex] and [tex]\((2n+10)^\circ\)[/tex]. What are the two different angle measures of the parallelogram-shaped tile?

A. [tex]\(20^\circ\)[/tex] and [tex]\(160^\circ\)[/tex]

B. [tex]\(50^\circ\)[/tex] and [tex]\(130^\circ\)[/tex]

C. [tex]\(30^\circ\)[/tex] and [tex]\(150^\circ\)[/tex]

D. [tex]\(70^\circ\)[/tex] and [tex]\(110^\circ\)[/tex]

Sagot :

To determine the two different angle measures of Jacob's parallelogram-shaped tile, we start by using the given angle expressions:

1. One of the angles is [tex]\(6n - 70\)[/tex] degrees.
2. The opposite angle is [tex]\(2n + 10\)[/tex] degrees.

Since opposite angles in a parallelogram are equal, we can set the two expressions equal to each other and solve for [tex]\(n\)[/tex]:

[tex]\[ 6n - 70 = 2n + 10 \][/tex]

First, we need to isolate [tex]\(n\)[/tex] on one side of the equation. To do this, we subtract [tex]\(2n\)[/tex] from both sides:

[tex]\[ 6n - 2n - 70 = 10 \][/tex]

Simplify the equation:

[tex]\[ 4n - 70 = 10 \][/tex]

Next, we add 70 to both sides to isolate the term with [tex]\(n\)[/tex]:

[tex]\[ 4n = 80 \][/tex]

Now, we divide both sides by 4 to solve for [tex]\(n\)[/tex]:

[tex]\[ n = 20 \][/tex]

With [tex]\(n = 20\)[/tex], we substitute back into the expressions for the angles to find the specific measures:

For the first angle:

[tex]\[ 6n - 70 = 6(20) - 70 = 120 - 70 = 50^\circ \][/tex]

For the opposite angle:

[tex]\[ 2n + 10 = 2(20) + 10 = 40 + 10 = 50^\circ \][/tex]

Then, determine the measure of the other pair of angles in the parallelogram. Since the angles in any quadrilateral sum to [tex]\(360^\circ\)[/tex], and a parallelogram has two pairs of equal opposite angles, we calculate the remaining angles:

[tex]\[ 180^\circ - 50^\circ = 130^\circ \][/tex]

Thus, the two different angle measures of the parallelogram-shaped tile are:

[tex]\[ 50^\circ \text{ and } 130^\circ \][/tex]

Therefore, the correct choice is:

[tex]\[ \boxed{50^\circ \text{ and } 130^\circ} \][/tex]
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