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How to Find the Distance Between Two Points
The formula The distance between two points $A(x_1, y_1)$ and $B(x_2, y_2)$ is: $$ d = \sqrt{(x_2 – x_1)^2 + (y_2 – y_1)^2}. $$ In other words, subtract the $x$-coordinates and the $y$-coordinates first. Then, we square both, and add them. Finally we take the square root of the sum. Here’s a worked example: Find…
Understanding Mathematics: Beyond Memorization
Does understanding math actually help with exam scores, or is memorization just faster? Here’s what the evidence from Class 9 classrooms actually shows.
Inside an Activity-First Lesson: What Students Actually Do
What does ‘activity-first learning’ actually look like in a real Class 9 math lesson? A step-by-step walkthrough of one activity, start to finish.