Grade 8 · Mathematics · Space
Congruence and quadrilaterals
Identify the conditions that show two triangles are congruent, and use them to explore the properties of parallelograms, rhombuses, rectangles and squares.
Awaiting educator review. This material was drafted by our content team with AI assistance and is waiting for review by a qualified educator. Please check it suits your child before using it. Created 10 October 2026.
These lessons were written around Australian Curriculum strands and matched to US grades by age (Kindergarten is the first year). They are not aligned to the Texas Essential Knowledge and Skills (TEKS), and some use Australian spelling, metric units or Australian dollars, so check them against your own curriculum.
This topic is currently an outline — a full lesson with worked examples and practice questions is on our list. In the meantime you can build a lesson plan template for it, or find related worksheets.