Die sypaneel en die agterpaneel is reguit.

Afrikaans usually repeats the definite article before each noun when you mean the side panel and the rear panel.

So:

• die sypaneel en die agterpaneel = the side panel and the rear panel

This is the most natural and standard way to say it. In some contexts, learners wonder if one die could cover both nouns, but repeating it is normal and clear in Afrikaans.

In Afrikaans, is is used for both singular and plural.

So:

• Die paneel is reguit = The panel is straight
• Die panele is reguit = The panels are straight

Unlike English, Afrikaans does not change the form of to be in the present tense this way. That is why is is correct even though the subject has two items joined by en.

Sypaneel is a compound noun:

• sy = side
• paneel = panel

So sypaneel literally means side panel.

Afrikaans often forms nouns by joining words together into one compound, just like German and sometimes English does.

Agterpaneel is also a compound noun:

• agter = back / rear / behind
• paneel = panel

So agterpaneel means rear panel or back panel, depending on context.

Again, this is a very normal Afrikaans compound noun.

Because Afrikaans commonly writes compound nouns as a single word.

Examples:

• sy + paneel → sypaneel
• agter + paneel → agterpaneel

This is something English speakers often need to get used to, because English sometimes writes similar expressions as two words, like side panel. In Afrikaans, one-word compounds are very common and usually the expected spelling.

Here reguit comes after the verb is, so it is being used predicatively:

• Die sypaneel is reguit. = The side panel is straight.

In this position, Afrikaans adjectives usually do not take extra endings.

Compare:

• Die paneel is reguit. = predicative
• ’n Reguit paneel = attributive, before the noun

So in your sentence, reguit stays simple because it comes after is.

Usually reguit is the normal everyday word for straight in a sentence like this.

• Die sypaneel is reguit. = The side panel is straight.

Other words may exist in more specific or technical contexts, but reguit is the standard choice for physical straightness here. A learner should definitely remember reguit as the basic word.

The word order is very straightforward:

• Die sypaneel en die agterpaneel = subject
• is = verb
• reguit = adjective/complement

So the structure is:

Subject + verb + complement

This is similar to English:

• The side panel and the rear panel are straight.

Afrikaans main clauses often look very familiar to English speakers in simple sentences like this.

Only if you want to change the meaning.

• Die sypaneel en die agterpaneel is reguit.
  = specifically the side panel and the rear panel are straight

• Die panele is reguit.
  = The panels are straight

The second version is more general and does not explicitly identify which panels you mean. The original sentence is more precise.

A rough guide for English speakers is something like ruh-GAYT or ruh-KHAYT, depending on accent and how closely you try to match the Afrikaans sounds.

A few notes:

• r is usually rolled or tapped more than in English
• g in Afrikaans is a throat sound, not the English g in go
• ui is a distinct Afrikaans vowel sound that English does not have exactly

You do not need a perfect accent at first; the important thing is to recognize reguit as the common word for straight.

Yes. Die is the normal definite article in Afrikaans for both singular and plural.

Examples:

• die paneel = the panel
• die panele = the panels

So in your sentence, die sypaneel and die agterpaneel both use the same article die. Afrikaans does not change it the way some other languages do.

In a yes/no question, Afrikaans usually puts the verb first:

• Is die sypaneel en die agterpaneel reguit?

That means:

• Are the side panel and the rear panel straight?

This verb-first pattern is very common in Afrikaans questions.