Math Problem Statement

Find the values of x and y in the angle system where the angles are (18y + 5)°, (10x - 61)°, and (x + 10)°, and vertical and linear pair angle properties apply.

Solution

The image shows a system of intersecting lines with angle expressions involving variables xx and yy. We are tasked with finding the values of xx and yy.

Here's the breakdown of the angles given:

  • One angle is (18y+5)(18y + 5)^\circ,
  • Another angle is (10x61)(10x - 61)^\circ,
  • A third angle is (x+10)(x + 10)^\circ,
  • A fourth angle is directly across from (18y+5)(18y + 5)^\circ, and they are vertical angles.

Step 1: Set up the vertical angle equation

Since vertical angles are equal, we can set the following equation:

18y+5=10x6118y + 5 = 10x - 61

Step 2: Use the linear pair property

Two adjacent angles on a straight line sum to 180180^\circ. Therefore, the angles (x+10)(x + 10)^\circ and (10x61)(10x - 61)^\circ form a linear pair, so:

(x+10)+(10x61)=180(x + 10) + (10x - 61) = 180

Now let's solve these equations to find xx and yy. I'll work on the algebra next.The values of the variables are:

  • x=21x = 21
  • y=8y = 8

Would you like a further explanation on how these values were derived, or do you have any other questions?

Here are some related questions to further expand on this topic:

  1. What are vertical angles, and why are they equal?
  2. How can you recognize linear pairs of angles in other geometrical figures?
  3. What properties of angles do intersecting lines always exhibit?
  4. How would you verify that these values of xx and yy satisfy both angle equations?
  5. What other methods could you use to solve systems of equations in geometry?

Tip: In geometry problems, always look for properties like vertical angles or supplementary angles to set up equations and solve for unknowns.

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Math Problem Analysis

Mathematical Concepts

Algebra
Angle Relationships
Linear Pairs
Vertical Angles

Formulas

Vertical angles are equal: A1 = A2
Linear pairs sum to 180°: A1 + A2 = 180°

Theorems

Vertical Angles Theorem
Linear Pair Postulate

Suitable Grade Level

Grades 8-10