Geometry is a section of mathematics relating to terms like points, lines, and shapes.

## Geometry Vocabulary Words for Kids

So, here is a list of words related to geometry for a complete beginner.

Term | Meaning |

Point | A dot |

Line Segment | It is a line within two points |

Intersecting Line Segments | Line segments which intersect each other |

Parallel Line Segments | Two line segments which never meet each other |

Perpendicular Line Segment | Line segments that form 90 degrees when they intersect |

Angle | The space between two intersecting lines |

Acute Angle | An angle less than 90 but more than 0 degrees |

Right Angle | An angle which exactly measures 90 degrees |

Obtuse Angle | An angle less than 180 but more than 90 degrees |

Exterior Angle | An angle formed on the outer side of two parallel lines when a third line intersects the 2 lines |

Equilateral Triangle | A triangle having its sides and angles equal to each other, (angles = 60 degrees) |

Isosceles Triangle | A triangle having its 2 sides equal to each other |

Scalene Triangle | A triangle with unequal sides and angles |

Acute Triangle | A triangle with all angles measuring lower than 90 degrees |

Obtuse Triangle | A triangle with one angle that measures more than 90 degrees |

Right Triangle | A triangle with an angle that is equal to 90 degrees |

Circle | A round figure with no sides and an equidistant center |

Radius | A line from the equidistant centre of the circle to the surface |

Square | A shape with all equal sides and angles |

Rectangle | A parallelogram having 4 right angles |

Rhombus | A parallelogram with all equal sides |

Parallelogram | A shape with parallel and equal opposite sides |

Polygon | A closed shape bounded by straight edges |

Quadrilateral | A quadrilateral is a polygon with 4 sides |

Pentagon | A shape which has 5 sides |

Hexagon | A shape which has 6 sides |

Heptagon | A shape which has 7 sides |

Octagon | A shape which has 8 sides |

Let’s have a look at vocabulary related to Circles, We know that a Circle is a set of all points in a plane at a given distance from a given point in the plane. But there are some terms related to circle like arc, radius, diameter etc. which describe its properties.

Let’s have a look at common words related to circle with their definitions:

Word | Meaning |

arc | a part of a circle |

congruent arcs | arcs that have the same measure AND are in the same or congruent circles |

central angle | angle whose vertex is the center of a circle |

circle | set of points in a plane that are equidistant from a given point |

chord | segment that has both endpoints on the circle |

concentric circles | circles that are coplanar and have the same center |

congruent circles | circles that have congruent radii |

circle circumscribed about a polygon | circle that has contains all the vertices of a polygon |

circle inscribed in a polygon | circle that has sides of a polygon as tangent lines |

diameter | chord that contains the center |

radius | segment whose endpoints are the center of the circle and a point on the circle |

secant | line that intersects a circle in exactly two points |

semicircle | arc with measure exactly 180 degrees |

tangent | line that intersects a circle in exactly one point |

Minor Arc |
A minor arc has a measure that is less than 180D . |

Major Arc |
A major arc arc has a measure that is greater than 180D |

Inscribed Angle |
An angle whose vertex is a point on a circle and whose sides contain chords. |

The knowledge of these terms will help your kid in understanding the subject more efficiently.

Keep exploring EnglishBix to learn words related to different math concepts.

Related Articles

Multiplication Vocabulary Words | Statistics and Probability Words |

Algebra Vocabulary Words | Cardinal and Ordinal Numbers |