Use two matchsticks to make two square corners and then four square corners. Draw and show it in the space given below:
Making One Square Corner: Two matchsticks can make one square corner by meeting at one endpoint at right angles (L-shape arrangement).
Making Two Square Corners: It is not possible to make exactly two square corners with two matchsticks. Two matchsticks can make either 1 square corner (L-shape) or 4 square corners (crossing at right angles).
Making Four Square Corners: To make four square corners, arrange the matchsticks by crossing them at right angles (like a + sign).
Explanation
The chapter uses matchsticks to help children understand square corners. Two matchsticks can form one square corner when they meet at one endpoint at right angles (L-shape), or four square corners when they cross at right angles. It is impossible to make exactly two square corners with only two matchsticks.
Solution Steps
Two matchsticks can make one square corner by meeting at one endpoint at right angles (L-shape arrangement).
It is not possible to make exactly two square corners with two matchsticks. A V-shape with a 90° opening creates only one square corner at the vertex.
To make four square corners, arrange the matchsticks by crossing them at right angles (like a + sign).