Geometry

a three-dimensional figure made of six square or rectangular faces

The dice used in board games are typically shaped like cubes.

rounded in shape but wider in one direction, such as the shape of an egg

The oval mirror hung above the dresser, reflecting the room's decor with its elegant curvature.

a naturally occurring, extremely hard crystalline form of carbon, prized as a gemstone

the space between two lines or surfaces that are joined, measured in degrees or radians

She used a protractor to measure the angle of the triangle accurately.

a long narrow mark on a surface

The child scribbled colorful lines on the paper.

the most important thing that is said or done which highlights the purpose of something

The professor made a crucial point about the importance of environmental conservation.

a stone monument built in ancient Egypt usually as a tomb for the pharaohs, which has a triangular or square base that slopes up to the top

Tourists flock to see the ancient pyramids in Egypt.

the outer part or top layer of something that you can touch or see

He used a soft cloth to clean the dusty surface of the bookshelf.

the body part that pushes the blood to go to all parts of our body

He couldn't hide the happiness in his heart when he saw his loved ones after a long time.

a completely round, plain shape

She used a compass to draw a small circle on the map.

a shape with four equal straight sides and four right angles, each measuring 90°

Each tile on the bathroom floor was a small square shape.

a curved symmetrical structure that supports the weight above it, used in bridges or buildings

The Golden Gate Bridge in San Francisco is a famous example of a suspension bridge with massive arches.

(geometry) a shape that consists of a line alternating its direction to left and right

any half of a circle

The children sat in a semicircle around the teacher during story time.

to move or extend in a continuous and widening circular pattern

The smoke has spiraled upward from the chimney into the night sky.

a line or shape that is not straight and bends gradually

He drew a curve on the paper to represent the arc of the ball's trajectory.

(computing) a flat round object used to store data on

She saved the important files to an external disk to back them up in case of computer failure.

either half of a sphere

The sports arena's roof was designed in the shape of a hemisphere.

(anatomy) a rounded part of an organ, such as, lungs or brain that seems to be separate in some way from the rest

The brain is divided into different lobes, each responsible for specific functions such as sensory perception, motor control, and language processing.

(geometry) a flat shape with four right angles, especially one with opposing sides that are equal and parallel to each other

In geometry class, they practiced calculating the area of a rectangle.

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

The artist used a triangle shape to create a dynamic composition.

an angle that measures between 0 and 90 degrees, which is less than a right angle (90 degrees)

an angle that measures more than 90 degrees but less than 180 degrees

In a triangle, an obtuse angle is one that is greater than 90 degrees but less than 180 degrees.

an angle measuring exactly 90 degrees

To construct a square, each corner must form a perfect right angle.

an angle that measures exactly 180 degrees, which is the same as a straight line

the central point or line around which an object turns

The Earth spins on its axis once every twenty-four hours.