QUESTION IMAGE
Question
use the diagram below to complete 10-12. (diagram not drawn to scale).
10.) identify the relationship of the two angles written in terms of x.
(5x+40)°
(7x)°
11.) write an equation using the two angles written in terms of x, and then solve for x. (show your work!)
12.) what is the measure of each angle written in terms of x? (show your work!)
use the diagram below to complete 13-15. (diagram not drawn to scale).
13.) identify the relationship of the two angles written in terms of y.
(7y)°
(5y)°
14.) write an equation using the two angles written in terms y, and then solve for y. (show your work!)
15.) what is the measure of the two angles that are written in terms of y? (show your work!)
Question 10:
Step1: Analyze the diagram
The two angles \((5x + 40)^{\circ}\) and \((7x)^{\circ}\) are formed by a transversal intersecting two parallel lines. From the diagram, we can see that these two angles are alternate exterior angles (or we can also observe that they are equal because of the parallel lines and transversal, so they are congruent).
Step2: Identify the relationship
Since the lines are parallel, the two angles are equal (congruent) as they are alternate exterior angles (or corresponding angles in some cases, but from the position, alternate exterior angles which are equal when lines are parallel). So the relationship is that they are equal (congruent) angles.
Step1: Set up the equation
Since the two angles are equal (from question 10), we can set up the equation \(5x + 40=7x\).
Step2: Solve for \(x\)
Subtract \(5x\) from both sides of the equation:
\(5x + 40-5x=7x - 5x\)
\(40 = 2x\)
Divide both sides by 2:
\(x=\frac{40}{2}=20\)
Step1: Find the measure of \((5x + 40)^{\circ}\)
Substitute \(x = 20\) into \(5x+40\):
\(5\times20 + 40=100 + 40 = 140^{\circ}\)
Step2: Find the measure of \((7x)^{\circ}\)
Substitute \(x = 20\) into \(7x\):
\(7\times20=140^{\circ}\)
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The two angles \((5x + 40)^{\circ}\) and \((7x)^{\circ}\) are equal (congruent) angles (alternate exterior angles formed by a transversal intersecting two parallel lines).