Geometry Terms Flashcards
Grade 4 · Math · Flashcards
Practice key geometry vocabulary including shapes, angles, and lines for Grade 4.
Flashcards
- Point
- An exact location in space with no size or shape, usually shown as a dot.
- Line
- A straight path that goes on forever in both directions with no endpoints.
- Line Segment
- A part of a line with two endpoints — it has a definite length.
- Ray
- A part of a line that starts at one endpoint and goes on forever in one direction.
- Angle
- The space formed when two rays share the same endpoint (vertex).
- Right Angle
- An angle that measures exactly 90 degrees, like the corner of a square.
- Acute Angle
- An angle that measures less than 90 degrees.
- Obtuse Angle
- An angle that measures more than 90 degrees but less than 180 degrees.
- Parallel Lines
- Lines that are always the same distance apart and never intersect.
- Perpendicular Lines
- Lines that intersect to form a right angle (90 degrees).
- Polygon
- A closed, flat shape made of straight sides (triangle, square, hexagon, etc.).
- Symmetry
- When a shape can be folded along a line so both halves match exactly.
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