Math Problem Statement

Find the value of x. Then find the missing angle measures of the polygon. The triangle has angles 5x°, 2x°, and 110°. The sum of angles is 180°.

Solution

The problem presents a triangle where the sum of the angles is 180°. The angles in the triangle are given as 110°, 5x5x^\circ, and 2x2x^\circ. We can solve for xx using the angle sum property of triangles.

Step 1: Set up the equation

The sum of the angles in any triangle is always 180°. Therefore, we can write: 110+5x+2x=180110^\circ + 5x^\circ + 2x^\circ = 180^\circ

Step 2: Solve for xx

Combine like terms: 110+7x=180110^\circ + 7x^\circ = 180^\circ Now subtract 110° from both sides: 7x=707x^\circ = 70^\circ Finally, divide by 7: x=10x = 10^\circ

Step 3: Find the values of 5x5x and 2x2x

  • 5x=5×10=505x = 5 \times 10^\circ = 50^\circ
  • 2x=2×10=202x = 2 \times 10^\circ = 20^\circ

Final Answer:

  • x=10x = 10^\circ
  • 5x=505x = 50^\circ
  • 2x=202x = 20^\circ

Would you like further clarification on any of the steps?

Related Questions:

  1. What is the general formula for the sum of angles in any polygon?
  2. How do you calculate the angles of a regular polygon?
  3. Can you apply the same method to find angles in quadrilaterals?
  4. What are alternate methods for finding missing angles in a triangle?
  5. How do angle measures change when extending the sides of polygons?

Tip:

Always remember that the sum of the interior angles of a triangle is 180°, which is a useful property for solving many geometric problems.

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Math Problem Analysis

Mathematical Concepts

Algebra
Geometry
Angle Sum Property

Formulas

Angle sum property of triangles: Sum of angles = 180°

Theorems

Angle Sum Theorem for Triangles

Suitable Grade Level

Grade 6-8