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

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

How can washing soda be obtained?

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.

How many tangents can a circle have?

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

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

How many tangents can you draw on a circle.

Explain how a square is. a quadrilateral