Inklingo
A bright green five-sided geometric shape centered on a plain white background.

pentágono

pen-TAH-go-noh

nounmB1
pentagon?a geometric shape with five sides
Also:The Pentagon?when capitalized, referring to the US Department of Defense headquarters

📝 In Action

Un pentágono tiene cinco lados y cinco ángulos.

A2

A pentagon has five sides and five angles.

La base de la torre tiene forma de pentágono.

B1

The base of the tower is shaped like a pentagon.

El Pentágono emitió un comunicado oficial esta mañana.

B2

The Pentagon issued an official statement this morning.

Word Connections

Common Collocations

  • pentágono regularregular pentagon (all sides equal)
  • forma de pentágonopentagon shape

💡 Grammar Points

Always Masculine

Even though it ends in 'o', just remember it always takes 'el' or 'un'. Geometric shapes in Spanish are almost always masculine.

The Accent Mark

This word has an accent on the 'á' because the voice is strongest on the third-to-last syllable. In Spanish, these words always need a written accent mark.

❌ Common Pitfalls

Missing the Accent

Mistake: "pentagono"

Correction: pentágono (The accent mark is required to show where the stress falls when speaking).

⭐ Usage Tips

When to Capitalize

Only capitalize 'El Pentágono' if you are talking about the famous building in Washington D.C. If you are talking about a shape in math class, use lowercase.

✏️ Quick Practice

💡 Quick Quiz: pentágono

Question 1 of 1

How many sides does a 'pentágono' have?

📚 More Resources

Word Family

Frequently Asked Questions

Is 'pentágono' masculine or feminine?

It is a masculine noun, so you say 'el pentágono'.

Why does it have an accent mark?

Because the stress is on the third-to-last syllable (pen-TÁ-go-no). Spanish rules require an accent mark on all words stressed in this position.