sankakukin wo tukau.

It is read さんかくきん.

• 三角 = さんかく = triangle
• 巾 in this word is read きん

So the full word is さんかくきん.

三角巾 literally refers to a triangular cloth.

Depending on the situation, it can mean things like:

• a triangular bandage in first aid
• a headscarf or bandana
• a triangular cloth used in cooking or cleaning

So the exact English translation depends on context.

を marks the direct object of the verb.

In this sentence, 三角巾 is the thing being used, so を shows that it is the object of 使う.

So the structure is:

• 三角巾 = triangular bandage / triangular cloth
• を = object marker
• 使う = use

Because Japanese usually puts the verb at the end.

A very common word order in Japanese is:

• Subject + Object + Verb

So this sentence follows the normal Japanese pattern:

• 三角巾を使う
• literally: triangular bandage + object marker + use

This can sound backwards to an English speaker, but it is standard in Japanese.

使う is the plain form (dictionary form) of the verb.

使います is the polite form.

Both are correct, but they are used in different situations:

• 使う: plain, casual, dictionary style, often used in instructions, labels, notes, or simple example sentences
• 使います: polite everyday speech

So in a textbook or short instruction, 使う is very normal.

Japanese often omits the subject when it is understood from context.

So 三角巾を使う could mean:

• I use a triangular bandage
• You use a triangular bandage
• We use a triangular bandage
• Use a triangular bandage

The exact subject depends on the situation. In instructions, it often feels like Use a triangular bandage.

Japanese does not have articles like a, an, or the.

So 三角巾 can mean:

• a triangular bandage
• the triangular bandage
• sometimes just triangular bandages in a general sense

You figure out the best English wording from context.

In modern Japanese, the particle を is usually pronounced o.

So 三角巾を使う is pronounced roughly:

• さんかくきん を つかう
• with を sounding like o

Even though it is written を, its normal pronunciation as a particle is basically o.

You are right: natural Japanese normally does not use spaces like this.

The normal writing would be:

• 三角巾を使う。

Spaces are often added in beginner materials to make the parts easier to see:

• noun: 三角巾
• particle: を
• verb: 使う

So the spaces are just for learning, not standard writing.

Yes, absolutely.

• 三角巾を使う。 = plain form
• 三角巾を使います。 = polite form

The meaning is basically the same, but 使います sounds more polite and natural in regular conversation with people you do not know well.

Usually yes, but the most natural English translation can change depending on context.

For example, 使う can mean:

• use
• make use of
• employ
• sometimes spend in expressions like お金を使う = spend money

In this sentence, use is the most straightforward meaning.