Math Problem Statement

Find the value of X in the triangle configuration where angles are labeled as 120°, 3X°, and 2X°.

Solution

The image depicts a composite triangle configuration, where some angles are labeled, and we are tasked with finding the value of XX.

Given details:

  • There's a triangle where one of the angles is 120120^\circ.
  • Inside this triangle, there are two smaller angles labeled 3X3X^\circ and 2X2X^\circ.
  • Additionally, there are isosceles triangles indicated by the markings on the sides (with two sides being equal for the smaller triangles).

Steps to Solve:

  1. Main Triangle: In the large triangle, one of the angles is 120120^\circ, and the two remaining angles are in the smaller triangles:

    • 3X3X^\circ and 2X2X^\circ.

    Since the sum of angles in a triangle is always 180180^\circ, we can form the following equation: 120+3X+2X=180120^\circ + 3X^\circ + 2X^\circ = 180^\circ

    Simplifying this: 120+5X=180120^\circ + 5X^\circ = 180^\circ 5X=605X^\circ = 60^\circ X=12X = 12^\circ

Thus, the value of XX is 1212^\circ.

Let me know if you want further clarification or additional details!

Here are 5 related questions for practice:

  1. How would the solution change if the 120120^\circ angle was different?
  2. What are the properties of isosceles triangles that help in problems like these?
  3. What is the sum of internal angles in any triangle?
  4. Can you solve for the angles in any triangle if only two angles are given?
  5. What are the applications of triangle properties in real-world contexts?

Tip: When solving for unknown angles in any triangle, remember that the sum of interior angles always adds up to 180°.

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Math Problem Analysis

Mathematical Concepts

Geometry
Angles in Triangles
Isosceles Triangles

Formulas

Sum of angles in a triangle = 180°

Theorems

Angle Sum Property of Triangles

Suitable Grade Level

Grades 8-10