Question

Find the measurement of an interior angle of a regular decagon (10-sided figure).

Answer 1

Answer:

144°

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

Geometry

• Sum of Angles: 180(n - 2)

Step-by-step explanation:

Step 1: Define

Number of sides n = 10

Step 2: Find

1. Substitute:                    180(10 - 2)
2. Subtract:                       180(8)
3. Multiply:                        1440°

Step 3: Find 1 angle

We have 10 sides.

1. Divide:                    1440/10 = 144