Math Problem Statement

In the figure, three straight lines intersect at a point. Giving your reasons clearly, find the values of x and y.

Solution

The image shows a geometric problem where three straight lines intersect at a point, forming several angles. Some of the angles are labeled, and the task is to find the values of xx and yy. Here are the details based on the image:

  • One of the angles is labeled as 5252^\circ.
  • Another angle is labeled as xx^\circ.
  • One angle is labeled as 2y102y - 10^\circ.
  • There is also an unlabeled vertical angle at the point of intersection.

Step-by-Step Solution:

Since all the angles around the intersection point add up to 360360^\circ (as they form a full circle), we can set up an equation for the sum of these angles:

52+x+(2y10)+vertical angle=360.52^\circ + x^\circ + (2y - 10)^\circ + \text{vertical angle} = 360^\circ.

Let's break this down more thoroughly:

  1. Opposite Angles: From the diagram, we know that the angle opposite to 5252^\circ is also 5252^\circ (because vertically opposite angles are equal).
  2. Opposite Angles: The angle opposite xx is 2y102y - 10^\circ.

Thus, the sum of the angles around the intersection becomes:

52+52+x+(2y10)=360.52^\circ + 52^\circ + x^\circ + (2y - 10)^\circ = 360^\circ.

Simplify this equation:

104+x+2y10=360.104^\circ + x + 2y - 10^\circ = 360^\circ.

Combine like terms:

x+2y+94=360.x + 2y + 94^\circ = 360^\circ.

Subtract 94 from both sides:

x+2y=266.x + 2y = 266^\circ.

Next Steps:

Now you have the equation x+2y=266x + 2y = 266^\circ. From this equation, you can either:

  • Solve for one variable if the other is given, or
  • Use additional information from the problem if provided.

Would you like to proceed with solving this step, or do you have further details you'd like to share?


Follow-up Questions:

  1. What is the relationship between vertically opposite angles?
  2. How can angles on a straight line help in solving similar problems?
  3. What is the sum of angles around a point, and why does this matter?
  4. How do you solve linear equations with two variables if you have only one equation?
  5. How might other properties of the lines help you in more complex angle problems?

Tip: Always remember that the sum of angles around a point is 360360^\circ, and use that to help solve problems like this one!

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Math Problem Analysis

Mathematical Concepts

Geometry
Angles
Vertically Opposite Angles
Linear Equations

Formulas

Sum of angles around a point is 360°
Vertically opposite angles are equal

Theorems

Angle Sum Theorem
Vertically Opposite Angles Theorem

Suitable Grade Level

Grades 8-10