Learn what diameter means and how to measure it accurately with a ruler, tape, string or caliper. Includes formulas, worked examples, tool guidance and common mistakes.
Learn what perpendicular means, how to identify and draw perpendicular lines, the perpendicular symbol, slope rules, real-life examples, worked problems and a practice quiz.
Shapes are all around us — from the square tiles on the floor to the circular shape of the moon. But what exactly are shapes, and how can we categorize