Question

Helppppppppp pleaseeeeeee

Answer 1

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°

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°