Geometry Vocabulary for Students With Meaning A-Z

Comprehensive geometry vocabulary list for students from A to Z. This easy-to-understand guide breaks down complex geometry concepts into simple definitions. It helps students build a strong foundation in geometry.

From basic terms like “angle” and “circle” to more advanced concepts like “z-axis” and “zenith,” this vocabulary list is perfect for anyone looking to improve their understanding of geometry.

Geometry Vocabulary Words with meaning

The following is the list of Geometry vocabulary for students with meaning:

A

1. Angle: The space between two lines or surfaces that meet.
2. Arc: A part of the curve on a circle.
3. Axis: A straight line around which an object rotates or is symmetrically arranged.
4. Area: The amount of space inside a shape.
5. Acute Angle: An angle that is less than 90 degrees.

B

1. Base: The bottom side of a shape or figure.
2. Bisect: To divide something into two equal parts.
3. Box Plot: A graphical representation of data that shows the spread.
4. Boundary: The outer edge or surface of a shape.
5. Bell Curve: A graph shape that resembles a bell, often used to show normal distribution.

C

1. Circle: A round shape where all points are equally distant from the center.
2. Circumference: The distance around the edge of a circle.
3. Chord: A line that connects two points on a curve.
4. Cube: A three-dimensional shape with six square faces.
5. Center: The exact middle point of a shape or object.

D

1. Diameter: A line that passes through the center of a circle, connecting two points on its edge.
2. Diagonal: A straight line connecting opposite corners of a shape.
3. Distance: The length of space between two points.
4. Degree: A unit for measuring angles.
5. Decagon: A shape with ten sides.

E

1. Edge: The line where two faces of a 3D object meet.
2. Ellipse: A stretched-out circle, like an oval.
3. Equilateral Triangle: A triangle with all sides equal.
4. Endpoint: The point at the end of a line segment.
5. Exterior Angle: The angle formed outside a shape when one side is extended.

F

1. Face: A flat surface of a 3D object.
2. Fraction: A part of a whole, shown as two numbers divided by a line.
3. Factor: A number that divides evenly into another number.
4. Frequency: How often something happens, usually in data sets.
5. Focus: A point that helps define certain shapes like parabolas.

G

1. Geometry: The study of shapes, sizes, and properties of space.
2. Graph: A diagram showing relationships between different values.
3. Grid: A network of lines for locating points on a map or graph.
4. Gradient: The slope or steepness of a line.
5. Great Circle: The largest circle that can be drawn on a sphere.

H

1. Hexagon: A shape with six sides.
2. Height: The vertical distance from the base to the top of an object.
3. Hypotenuse: The longest side of a right-angled triangle.
4. Horizontal: A line or plane that is parallel to the horizon.
5. Hemisphere: Half of a sphere.

I

1. Intersection: The point where two lines meet.
2. Isosceles Triangle: A triangle with two equal sides.
3. Interior Angle: An angle formed inside a shape.
4. Infinity: A value that goes on without end.
5. Image: The shape that results from a transformation like reflection or rotation.

J

1. Joint: The point where two lines or shapes meet.
2. Junction: A meeting point of two or more paths or lines.
3. Jigsaw Puzzle: A puzzle made of interlocking shapes.
4. Jagged Line: A line with sharp angles or turns.
5. Jump Discontinuity: A gap in a graph where a sudden jump occurs.

K

1. Kite: A shape with two pairs of equal-length sides.
2. Kilometer: A unit of length equal to 1,000 meters.
3. Knot: A unit of speed equal to one nautical mile per hour.
4. Kernel: The core element of a mathematical set.
5. Kaleidoscope: A tool that uses mirrors to create patterns from shapes.

L

1. Line: A straight path that extends infinitely in both directions.
2. Length: The measurement of something from end to end.
3. Latitude: The angular distance of a point from the equator.
4. Limit: The value a function approaches as the input approaches some point.
5. Locus: A set of points that satisfy a certain condition.

M

1. Midpoint: The exact middle point of a line segment.
2. Metric System: A decimal system of measurement.
3. Matrix: A rectangular array of numbers or variables.
4. Magnitude: The size or length of a vector.
5. Median: The middle value in a data set.

N

1. Nonagon: A shape with nine sides.
2. Net: A flattened-out 3D shape.
3. Negative Number: A number less than zero.
4. Numerator: The top number in a fraction.
5. Normal Distribution: A probability distribution that is symmetrical and bell-shaped.

O

1. Obtuse Angle: An angle greater than 90 degrees but less than 180 degrees.
2. Octagon: A shape with eight sides.
3. Origin: The point (0,0) on a coordinate plane.
4. Orthogonal: Two lines or vectors at right angles to each other.
5. Ordinal Numbers: Numbers that indicate position or order.

P

1. Perimeter: The total distance around the edge of a shape.
2. Parallel Lines: Lines that never meet, no matter how long they are extended.
3. Polygon: A closed shape with three or more sides.
4. Plane: A flat surface that extends infinitely in all directions.
5. Pythagorean Theorem: A formula for right-angled triangles: a² + b² = c².

Q

1. Quadrilateral: A shape with four sides.
2. Quadrant: One of the four sections of a coordinate plane.
3. Quotient: The result of division.
4. Quarter Circle: One-fourth of a circle.
5. Qualitative Data: Data that describes qualities, not numbers.

R

1. Radius: The distance from the center of a circle to its edge.
2. Rectangle: A shape with four sides and four right angles.
3. Reflection: Flipping a shape over a line so it creates a mirror image.
4. Rhombus: A shape where all sides have equal length, but opposite angles are equal.
5. Right Angle: An angle of 90 degrees.

S

1. Sphere: A perfectly round 3D shape.
2. Square: A shape with four equal sides and four right angles.
3. Symmetry: When one part of a shape is the mirror image of another part.
4. Scalene Triangle: A triangle with all sides of different lengths.
5. Segment: A part of a line between two endpoints.

T

1. Triangle: A shape with three sides.
2. Tangent: A line that touches a curve at only one point.
3. Trapezoid: A shape with one pair of parallel sides.
4. Translation: Moving a shape without rotating or flipping it.
5. Tetrahedron: A 3D shape with four triangular faces.

U

1. Unit Circle: A circle with a radius of one.
2. Uniform: Having the same size, shape, or arrangement.
3. Upper Bound: The largest value in a range.
4. Upright: Standing straight up or at a right angle.
5. Utility: A function that shows preferences in economics or decision-making.

V

1. Vertex: The point where two lines meet.
2. Volume: The amount of space a 3D object takes up.
3. Vector: A quantity with both direction and magnitude.
4. Venn Diagram: A diagram that shows relationships between sets.
5. Variable: A symbol used to represent a number or value.

W

1. Width: The distance across an object or shape.
2. Wavelength: The distance between two consecutive peaks in a wave.
3. Weighted Average: An average where some values have more importance than others.
4. Wedge: A 3D shape that is narrow at one end and wider at the other.
5. Wireframe: A skeletal representation of a 3D shape.

X

1. Xenon: A chemical element used in lasers and lighting, linked to geometry in physics.
2. X-Axis: The horizontal line on a graph.
3. X-Intercept: The point where a line crosses the x-axis.
4. Xylometer: An instrument used to measure the volume of wood, linked to geometry in measurement.
5. X-Angle: A term used to describe an angle measured along the x-axis in 3D geometry.

Y

1. Y-Axis: The vertical line on a graph.
2. Y-Intercept: The point where a line crosses the y-axis.
3. Yard: A unit of length equal to 3 feet or 36 inches.
4. Y-Coordinate: The second number in an ordered pair. It shows a vertical position on a graph.
5. Yield: A term in economics and geometry for output or result, often represented graphically.

Z

1. Z-Axis: The axis in 3D geometry that adds depth to x and y coordinates.
2. Zenith: The highest point, often used in astronomy and geometry for spherical coordinates.
3. Z-Score: A statistical measure that describes a value’s position to the mean.
4. Zero Angle: An angle that measures 0 degrees.
5. Zigzag: A line made of sharp turns in different directions.

Also Read:

Economics Vocabulary For Students A-Z	Biology Vocabulary Words and Definitions
Physics Vocabulary for Students A-Z