A két kerék hasonló.

Because Hungarian usually omits the present-tense form of to be in the 3rd person when the predicate is a noun or an adjective.

So:

• A két kerék hasonló. = The two wheels are similar.

There is no separate word for are here.

Compare:

• A kerék nagy. = The wheel is big.
• A kerekek nagyok. = The wheels are big.

But Hungarian does use van/vannak in other situations, especially with location or existence:

• A két kerék a garázsban van. = The two wheels are in the garage.

Both két and kettő mean two, but they are used differently.

• két is normally used directly before a noun
• kettő is usually used by itself, when the number stands alone

So:

• két kerék = two wheels
• Kettő van. = There are two.

This is why A két kerék... is correct, not A kettő kerék...

In Hungarian, after a number, the noun is usually kept in the singular.

So Hungarian says:

• két kerék = literally two wheel
• három könyv = literally three book
• öt ember = literally five person

The plural meaning is already clear from the number, so Hungarian does not add the plural ending -k to the noun in this structure.

Because a noun phrase with a numeral, like két kerék, is usually treated as grammatically singular for agreement in standard Hungarian.

So the predicate also stays singular:

• A két kerék hasonló.
• A két fiú magas.

But if you use a normal plural subject without a number, then the predicate is plural:

• A kerekek hasonlók. = The wheels are similar.
• A fiúk magasak. = The boys are tall.

So the singular form of hasonló is expected here.

Here a means the.

Hungarian has a definite article:

• a before a consonant
• az before a vowel

So:

• a kerék = the wheel
• az autó = the car

In A két kerék hasonló, a két kerék means the two wheels — a specific pair already known from context.

Without the article, két kerék would be more like two wheels, less specifically.

Not exactly. hasonló means similar, alike, or resembling. It does not necessarily mean identical.

So if two wheels are hasonló, they resemble each other, but they may still be different.

If you want identical or the same, Hungarian may use other words, depending on the meaning:

• azonos = identical
• ugyanaz = the same one
• ugyanolyan = the same kind / just like

So hasonló is closer to similar than to same.

It can, but it does not have to.

In A két kerék hasonló, the comparison target is understood from context: the two wheels are similar to each other.

If you want to make that explicit, you can say:

• A két kerék egymáshoz hasonló.
• A két kerék hasonló egymáshoz.

The adjective hasonló often goes with -hoz/-hez/-höz, which is the Hungarian way of expressing to in similar to.

For example:

• Ez a kerék hasonló ahhoz. = This wheel is similar to that one.

So the short sentence is fine, but a fuller version is also possible.

Yes. Hungarian word order is fairly flexible, and different orders can change the emphasis.

The sentence:

• A két kerék hasonló.

is a neutral statement, with a két kerék as the topic.

You could also say:

• Hasonló a két kerék.

That is grammatical too, but it can sound more marked, depending on context, as if you are emphasizing similar.

So the original order is a natural, straightforward way to say it.

A rough pronunciation guide is:

• A ≈ short aw
• két ≈ kayt
• kerék ≈ keh-rake
• hasonló ≈ ha-shon-loh

A few useful points:

• Hungarian stress is usually on the first syllable of each word.
• é and ó are long vowels.
• Hungarian s is pronounced like English sh.

So hasonló starts with a sh sound, not an English s sound.

A rough stressed version would be:

• a KÉT ke-RÉK HA-son-ló

Yes. hasonló is an adjective meaning similar.

In this sentence it works as a predicate adjective, just like big in The wheel is big.

So structurally, Hungarian is doing something like:

• A két kerék = subject
• hasonló = predicate adjective

Even though there is no visible word for are, the sentence is still complete and natural in Hungarian.