- Ray: A line with one endpoint that extends infinitely in one direction. Visual: An arrow starting at a point and extending infinitely in one direction. Symbol: →
- Quadrilateral: A four-sided polygon. Visual: A closed shape with four straight sides. Symbol: None specific, often labeled by vertices (e.g., ABCD).
- Rectangle: A quadrilateral with four right angles. Visual: A four-sided figure with opposite sides equal and all angles 90 degrees. Symbol: None specific, often labeled by vertices.
- Line: A straight path that extends infinitely in both directions. Visual: A straight line with arrows on both ends. Symbol: ↔
- Diameter: A line segment passing through the center of a circle, connecting two points on the circle. Visual: A straight line across a circle through its center. Symbol: None specific, often labeled as a segment (e.g., AB).
- Area: The space inside a figure. Visual: Shaded region within a shape. Symbol: None specific, often denoted as A.
- Parallel: Lines that never intersect. Visual: Two straight lines that remain equidistant and never meet. Symbol: ||
- Isosceles Triangle: A three-sided polygon with at least two congruent sides. Visual: A triangle with two equal-length sides. Symbol: None specific, often labeled by vertices.
- Midpoint: The point on a line segment that is equidistant from both endpoints. Visual: A point dividing a line segment into two equal parts. Symbol: None specific, often labeled as M.
- Chord: A line segment connecting two points on a circle. Visual: A straight line between two points on the circumference of a circle. Symbol: None specific, often labeled as a segment (e.g., AB).
- Radius: A line segment from the center of a circle to any point on the circle. Visual: A line from the center of a circle to its edge. Symbol: None specific, often labeled as r or a segment (e.g., OA).
- Line Segment: A line with two endpoints. Visual: A straight line with endpoints marked. Symbol: —
- Regular Polygon: A polygon with all sides and angles congruent. Visual: A polygon with equal sides and equal angles (e.g., equilateral triangle, square). Symbol: None specific, often labeled by vertices.
- Parallelogram: A quadrilateral with opposite sides parallel and congruent. Visual: A four-sided figure with opposite sides parallel. Symbol: None specific, often labeled by vertices.
- Congruent: Equal in size and shape. Visual: Two figures that can be superimposed exactly. Symbol: ≅
- Scalene Triangle: A three-sided polygon with no congruent sides. Visual: A triangle with all sides of different lengths. Symbol: None specific, often labeled by vertices.
- Perpendicular: Two lines that intersect at a right angle. Visual: Two lines intersecting at 90 degrees, often marked with a small square. Symbol: ⊥
- Perimeter: The distance around a figure. Visual: The boundary length of a shape. Symbol: None specific, often denoted as P.
Parent Tip: Review the logic above to help your child master the concept of geometry vocabulary worksheet.
