Hima Bindu

In this session, let’s explore rotational symmetry and how it is different from line symmetry. If you can rotate (or turn) a figure around a center point by fewer than 360° and the figure appears unchanged, then the figure has rotation symmetry. The point around which you rotate is called the center of rotation,…

Symmetry is one of the most important ideas in mathematics. In this session, we will explore geometric versions of symmetry by creating designs and examining their properties. If we can reflect (or flip) a figure over a line and the figure appears unchanged, then the figure has reflection symmetry or Line symmetry. The line…

When introducing Trigonometry I usually ensure students draw and measure right triangles using any of the similar triangle properties. I then ask them to look for pattens w.r.t. ratio of sides. But if I fall short of time I’ll show them these three triangles and ask what they have in common. Students spot that…

Probability is wrongly assumed as one of the easiest chapters by teachers and students alike. Infact, this chapter has scope for committing many errors by the students. What makes Probability so very challenging for students? Use the following ppt as a final recap once the chapter has been done. Dear teachers, also find a…

During my observation, I have observed that teaching ‘Ratio’ continues to be an area of difficulty. We  are still using the age old Algebraic methods to solve Ratio related problems. Lets use a more approachable method called ‘Scaling’ method. This involves taking the initial ratio and finding a series of equivalent ratios until we…

Objective: Use conventional method to prioritize order of operations. Why do we need order of operations? What is the answer to this. Did you get 20 ? Did you also see how the answer could be 16 ? There are two possible ways to do this … So which of the above answers do…

Pythagoreans didn’t really like these numbers – because they couldn’t measure some lengths properly and called them ‘absurd’. Surds is such an interesting topic which gets introduced to students at class 9 level. I really enjoy teaching and solving problems related to surds. As Math teachers we really clear off a lot of misconceptions…

Since ages, we have been introducing angle sum property of a polygon in the following way… Suppose we need to find angle sum of a pentagon Here we have a pentagon ABCDE. In order to find the angle sum, we draw diagonals from one of the vertices of the pentagon and divide it into…