Please calculate the area of this right triangle.

He is studying the history of African Americans.

He drew an equilateral triangle shape.

The parasympathetic nerves help our body to relax and conserve energy.

Tomorrow's flight has been cancelled as planned.

Tomorrow's flight has been cancelled as planned.

I checked the train schedule by looking at the electronic noticeboard at the station.

The styloglossus muscle plays a role in raising and pulling the tongue back.

The border patrol is strictly monitoring to prevent illegal immigration.

She is learning the grammar of the present progressive form.