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Trifollaro

Trifollaro is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Trifollaro rather than just read about it. In short: The trifollaro or trifollaris was a copper coin minted in southern Italy under the Normans. It was worth 120 nummi or 3 folles.

Trifollaro — main illustration
Trifollaro — illustration

Key takeaways

  • Trifollaro belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Trifollaro to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Trifollaro from memory before moving on to harder problems.

Reference excerpt

The trifollaro or trifollaris was a copper coin minted in southern Italy under the Normans. It was worth 120 nummi or 3 folles. The name trifollaro, used by scholars, was coined by the Italian numismatist Rodolfo Spahr. Contemporary sources do not use the name. Spahr interpreted the phrase tres follares aereos romesinam unam appretiatos ("three new copper follares should be taken as one romesina") in Falco of Benevento's discussion of the currency reform of 1140 as a reference to a new denomination of coin. Count Roger I of Sicily (reigned 1071–1101) minted both folles and trifollari at Mileto. The latter are on average about three times as heavy as the former (10.6 to 3.4 grams). While the folles have a large Tau cross on them, the trifollari have an image of an armed equestrian figure. Philip Grierson argues that it is likely an image of the count made from life, since it has no identifiable model or parallel in contemporary art or sculpture. It is perhaps close in style to the contemporary Norman Bayeux Tapestry. Duke William II of Apulia minted trifollari at Mileto. Those minted around the time of William's investiture by Pope Paschal II in 1114 bear an equestrian effigy in imitation of those of Roger I. Later examples have a variety of different images: busts, stars, crosses, etc. In about 1184, King William II of Sicily began minting at Messina a trifollaro with a lion's face (or mask) on the obverse and a fruited date-palm on the reverse. This was a debased coin, much smaller than the trifollari minted a century earlier. The lion's face appears to be a copy of a Siculo-Punic coin minted at Messina in the fifth century BC—1500 years earlier. These may still have been in circulation in Messina in 1184. The date-palm may have been a symbol meant for William's Muslim subjects, since the Quran says Mary ate dates at the time of Jesus' birth.

Notes

Sources

Illustrations

Trifollaro: Trifollaro of Roger I
Trifollaro of Roger I

Worked examples

Example 1 — a first encounter with Trifollaro

Start with the simplest possible case. Write down what Trifollaro claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Trifollaro before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Trifollaro ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Trifollaro

In research
Trifollaro appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Trifollaro in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Trifollaro is common in secondary-school and first-year university syllabi. It links to neighbouring topics Coins, Mileto, so understanding it makes those chapters shorter.
In everyday life
Look for Trifollaro outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Trifollaro in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Trifollaro means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Trifollaro out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Trifollaro in simple terms?

The trifollaro or trifollaris was a copper coin minted in southern Italy under the Normans. It was worth 120 nummi or 3 folles.

Why does Trifollaro matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Trifollaro?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Trifollaro.

Tags

  • Coins
  • Mileto

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