K-5 friendly lesson
Try one idea, then jump into the activity.These lessons are designed to feel short, friendly, and easy to follow.
Identify quadrilaterals
Quadrilaterals are 4-sided polygons. Spotting them builds geometry confidence.
Lesson 2
Concept
A quadrilateral: - has 4 straight sides - has 4 corners (vertices) - is closed (no gaps) Examples: - square - rectangle - rhombus - trapezoid Not quadrilaterals: - triangle (3 sides) - pentagon (5 sides) - open shapes
Try it
Decide if each is a quadrilateral: 1. A closed shape with 4 sides 2. A triangle 3. A rectangle 4. A 5-sided polygon 5. Draw two different quadrilaterals