Math Problem Statement

The measures of the angles of a triangle are shown in the figure below. Solve for x.

Solution

In this problem, we are given a triangle with the angles labeled as:

  • (x+19)(x + 19)^\circ,
  • 4141^\circ,
  • 105105^\circ.

The sum of the interior angles of any triangle is always 180180^\circ. Therefore, we can set up the equation:

(x+19)+41+105=180(x + 19)^\circ + 41^\circ + 105^\circ = 180^\circ

Now, let's solve this equation step by step.

Step 1: Combine like terms on the left-hand side.

x+19+41+105=180x + 19 + 41 + 105 = 180

x+165=180x + 165 = 180

Step 2: Subtract 165 from both sides to isolate xx.

x=180165x = 180 - 165

x=15x = 15

So, the value of xx is 15 degrees.

Would you like more details, or do you have any further questions on this?

Here are some follow-up questions for practice:

  1. How do you find the sum of angles in a triangle?
  2. What would the equation look like if the angle labeled (x+19)(x + 19)^\circ were given as (x+25)(x + 25)^\circ?
  3. If one of the angles of a triangle is 9090^\circ, what type of triangle is it?
  4. Can a triangle have two angles that are both greater than 9090^\circ?
  5. How would you approach the problem if one angle was unknown, but the two others summed to 110110^\circ?

Tip: Always double-check your calculations when solving for an unknown in a geometry problem by ensuring the sum of all angles adds up to 180°.

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Math Problem Analysis

Mathematical Concepts

Geometry
Triangle Angles
Linear Equations

Formulas

Sum of angles in a triangle = 180°

Theorems

Triangle Angle Sum Theorem

Suitable Grade Level

Grades 6-8