Door 1
Rational Numbers
Closure Property: Sum or product of two rational numbers is always a rational number
Grade 8 maths — every concept, with examples
The whole Grade 8 syllabus, chapter by chapter. Read a chapter's concepts and worked examples, then open its door to play.
Door 2
Irrational Numbers
Irrational numbers cannot be written as \(p/q\) where \(p\) and \(q\) are integers (\(q ≠
Door 3
Integers & Absolute Value
Integers include positive numbers, negative numbers, and zero (no fractions or decimals)
Door 4
Algebraic Expressions
A term is a single part of an expression separated by \(+\) or \(-\) signs
Door 6
Patterns & Sequences
An arithmetic sequence has a constant difference between consecutive terms
Door 8
Basic Geometry
A point specifies a location, a line extends endlessly in both directions, and a plane is
Door 9
Triangles
Scalene: all sides different | Isosceles: two sides equal | Equilateral: all sides equal
Door 10
Quadrilaterals
Any four-sided closed flat shape is a quadrilateral, and its interior angles always sum up
Door 12
Circles
A circle's radius goes from the center to the edge; the diameter cuts all the way across t
Door 13
Transformations
A translation moves a shape cleanly along a straight track without tilting it
Door 19
Ratio, Proportion and Percentages
A ratio compares two quantities of the same kind: \(a : b = a/b\)