Topic explanation

Standard explanation

A quadrilateral is fixed by enough independent sides, angles, and diagonals; a diagonal often divides the work into two triangles.

Key points

• constructing quadrilaterals
• understand the idea
• apply it carefully
• keep the ideas separate
• Constructing Quadrilaterals: A quadrilateral is fixed by enough independent sides, angles, and diagonals; a diagonal often divide
• WHAT — CONSTRUCTING QUADRILATERALS: A quadrilateral is fixed by enough independent sides, angles, and diagonals; a diagonal often divide
• HOW — Use the idea: Identify what is given, select this topic's rule or evidence, apply it one step at a time, and check
• CORE UNDERSTANDING: A quadrilateral is fixed by enough independent sides, angles, and diagonals; a diagonal often divide

Labelled diagram