Geometry

(geometry) a solid or hollow shape with two circular bases at each end and straight parallel sides

The glass on the table was in the shape of a tall, slender cylinder.

(in geometry) a three-dimensional surface where all points are equidistant from a center

In art class, they learned to sculpt a sphere from clay.

(geometry) a closed shape with six straight sides and six angles

She decided to tile her bathroom floor with hexagon-shaped tiles.

(geometry) a three dimensional shape with a circular base that rises to a single point

The traffic cones were placed along the road to redirect vehicles during the construction work.

a straight line that touches a curve or surface at exactly one point, known as the point of tangency

In geometry class, we learned how to draw a tangent to a circle, ensuring it only touched the circle at a single point.

a flat-bodied marine cartilaginous fish with eyes on the upper surface, swimming primarily using large, wing-like pectoral fins

The diver spotted a manta ray gliding over the reef.

a type of triangle that has two sides of equal length and two angles of equal measure

In an isosceles triangle, the base angles opposite the equal sides are congruent.

(geometry) a polygon consisting of eight straight sides and eight angles

The stop sign is shaped like an octagon.

to move in a twisting or whirling motion, creating a pattern of circular or spiral motion

The leaves swirl in the wind during the autumn months.

a point where two or more lines, edges, or rays meet to form an angle, or the point at which the sides of a polygon intersect

In a triangle, each of its three corners is a vertex where two sides meet.

(geometry) a closed plane curve that has two focal points

(geometry) a flat shape consisting of three or more straight sides

A triangle is the simplest type of polygon with three sides.

a geometric shape with five angles and five straight sides

The flag of the city had a pentagon in the center, symbolizing the five founders.

(geometry) a line curved on a conical or cylindrical surface, like a spiral staircase in shape

(geometry) a flat polygon with ten straight sides and ten angles

Architects sometimes incorporate shapes like the decagon into their designs for a unique appearance.

(geometry) a flat shape consisting of nine straight sides and nine angles

a seven-sided plane shape consisting of seven line segments or edges that meet at seven interior angles

My young daughter proudly showed me the colorful heptagon she had cut out for her geometry homework assignment.

a three-dimensional shape similar to a stretched or compressed sphere

The Earth is often approximated as an oblate ellipsoid due to its slightly flattened shape at the poles.

a three-dimensional geometric shape with six rectangular faces, resembling a box or a rectangular prism

(geometry) a round 3D shape like a ball that is slightly flattened at the top and bottom points

The Earth is not quite a sphere but is better described as an oblate spheroid flattened at the poles.

(geometry) a solid figure with flat sides and two parallel ends of the same size and shape

a solid shape made of flat sides that fit together along their edges

The cube is a well-known example of a polyhedron, with six square faces.

a three-sided polygon

(geometry) a flat star-shaped figure with six points that can be formed by making equilateral triangles on each side of a regular hexagon

an angle that measures either less or more that 90 degrees

In a parallelogram, opposite angles are oblique angles since they are not right angles.

an angle that measures greater than 180 degrees but less than 360 degrees

a straight line from one side of a round object, particularly a circle, passing through the center and joining the other side

The diameter of a circle is the longest distance between any two points on its circumference, passing through the center.

the distance around the external boundary of something

The athlete completed a lap around the track, covering the entire circumference in record time.

the length of a straight line drawn from the center of a circle to any point on its outer boundary

The radius of a circle is half the length of its diameter, extending from the center to any point on the circumference.