Respuesta :

Space

Answer:

m∠1 = 66°

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality

Geometry

  • All angles in a triangle add up to 180°

Step-by-step explanation:

Step 1: Define

m∠1 + 34° + 80° = 180°

Step 2: Solve for Angle

  1. [Addition] Combine like terms:                                                                        m∠1 + 114° = 180°
  2. [Subtraction Property of Equality] Isolate Angle:                                           m∠1 = 66°

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