How many triangles can be obtained when the vertices of a hexagon are joined?

How many triangles can be obtained by joining the vertices of a quadrilateral?

How can washing soda be obtained?

How many tangents can a circle have?

How many tangents can you draw on a circle.

How many dynes make a newton?

How many triangles may be formed by joining any three of nine points on a plane when no three of them are collinear.

How many triangles may be formed by joining any three of nine points on a plane when five of them are collinear.

What is Hall-Heroult process? How many Al can be obtained by burning about 1kg carbon anode?

How is the unit cell of crystal characterised? How many basic crystal systems are obtained on the basis of this characterisation?