My father has been suffering from sciatica for a long time.

He became neurasthenic due to long hours of work.

If the motor nerves are damaged, you will lose control of your muscle movements.

Neurons are responsible for transmitting information in the brain.

This figure is an isosceles trapezoid.

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.