I bought a new brush, so I'm thinking of using it for the first time today.

I bought a new laptop, so I'm thinking of inaugurating it today.

He wrote a poem using a writing brush.

His collection of essays shows his deep thought and insight.

I am planning to take a written exam next week.

He is a good correspondent, always writing letters.

He is good at writing, especially at writing poems.

He was playing the guitar at the street corner.

This triangle has two acute angles.

We need to calculate the azimuth of this building.