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