QQuestionMathematics
QuestionMathematics
How many sides does a regular decagon have?
A. 11
B. 8
C. 9
D. 10
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Answer
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Step 1:I'll solve this problem step by step:
Step 2:: Understand the Definition of a Decagon
A decagon is a polygon with 10 sides. The prefix "deca-" comes from the Greek word for ten, which indicates the number of sides.
Step 3:: Count the Sides
Let's break down the word: - "Deca" = 10 - "gon" = angle or side
Step 4:: Verify the Number of Sides
10 \text{ sides} = \text{decagon}
Step 5:: Analyze the Given Options
A. 11 sides B. 8 sides C. 9 sides D. 10 sides
Step 6:: Select the Correct Answer
The correct answer is D. 10 sides.
Final Answer
Key Insight: The prefix "deca-" always indicates 10 in mathematical and scientific terminology, such as decameter (10 meters), decagram (10 grams), etc.
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