Countries around the world are caught up in an arms race.

The cytoskeleton plays a crucial role in maintaining the shape of the cell.

He claims to have seen an unidentified flying object.

Let's calculate the area of this right-angled triangle.

Because of his color blindness, he has difficulty distinguishing between red and green.

Please calculate the area of this right triangle.

He believes that he has extrasensory perception.

The development of fusion reactors could potentially be the key to solving future energy problems.

He drew an equilateral triangle shape.

Tomorrow's flight has been cancelled as planned.