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Historical ErasPlay
Centuries categorize history into 100-year blocks to simplify reference to specific eras. SlideThe Renaissance spanned the 14th to the 17th century.
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Ordinal NumbersPlay
When talking about centuries, use ordinal numbers like 20th, 21st to describe sequential order. SlideThe telephone was invented in the 19th century.
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Common MisunderstandingPlay
The 20th century refers to the years 1900-1999, not 2000-2099, as might be commonly misunderstood. SlideWorld War II happened in the 20th century.