Math Problem Statement

If m∠ABD = 110°, and m∠DBC = 35°, then m∠ABC = [ ? ]°.

Solution

To solve for mABCm\angle ABC, let's analyze the given information.

Given:

  • mABD=110m\angle ABD = 110^\circ
  • mDBC=35m\angle DBC = 35^\circ
  • We need to find mABCm\angle ABC.

Step-by-step solution:

  1. Identify the relevant angles:

    • ABC\angle ABC is the sum of two smaller angles:
      mABC=mABD+mDBCm\angle ABC = m\angle ABD + m\angle DBC
  2. Apply the given values: mABC=110+35m\angle ABC = 110^\circ + 35^\circ

  3. Calculate: mABC=145m\angle ABC = 145^\circ

Final Answer:

mABC=145m\angle ABC = 145^\circ

Would you like further clarification or an explanation of any steps?


Here are some related questions for deeper understanding:

  1. What is the concept of adjacent angles?
  2. How can we use angle addition in polygons?
  3. Are there any angle properties related to triangles that might change if the lines intersect differently?
  4. How do linear pairs and supplementary angles differ from adjacent angles?
  5. What are some practical applications of these angle addition properties?

Tip: When adding angles, always ensure the angles are correctly aligned with the points involved (like A,B,D,CA, B, D, C here) to avoid confusion!

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Math Problem Analysis

Mathematical Concepts

Geometry
Angle Addition Postulate
Linear Pair of Angles

Formulas

m∠ABC = m∠ABD + m∠DBC

Theorems

Angle Addition Postulate

Suitable Grade Level

Grades 6-8