Geometry: Shapes and Quadrilaterals Flashcards
Grade 3 · Math · Flashcards
Review shape names, properties, and vocabulary for 2D geometry.
Flashcards
- Triangle
- 3 sides
- Quadrilateral
- 4 sides
- Pentagon
- 5 sides
- Hexagon
- 6 sides
- Octagon
- 8 sides — like a stop sign
- Polygon
- Any closed flat shape with straight sides
- Square
- 4 equal sides + 4 right angles
- Rectangle
- 4 sides + 4 right angles, opposite sides equal
- Rhombus
- 4 equal sides, angles not necessarily 90°
- Parallelogram
- 2 pairs of parallel sides
- Trapezoid
- Exactly 1 pair of parallel sides
- Right angle
- 90-degree corner — like the corner of this page
- Parallel lines
- Lines that never cross, always same distance apart
- Line of symmetry
- A fold line that creates two matching halves
- Is a square a rectangle?
- Yes — a square has 4 right angles, so it qualifies as a rectangle too.
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