Geometry Flashcards: Shapes and Definitions

What is a quadrilateral with all congruent sides?

What do you call a triangle with 2 congruent sides?

What is a polygon with 6 sides?

What do you call a 4-sided figure with all congruent sides and all congruent angles?

What is a 3-sided figure with 1 obtuse angle and 2 acute angles called?

What do you call a 4-sided figure with one pair of parallel sides?

What is a polygon with 5 sides?

What do you call a quadrilateral with opposite sides that are congruent?

What is a quadrilateral with all congruent angles called?

A trapezoid can have all congruent sides and all congruent angles.

What do you call a 3-sided figure with 2 acute angles and 1 right angle?

What is a quadrilateral that has all right angles called?

What do you call a rhombus that has 4 right angles?

What do you call a 4-sided figure that has 2 pairs of parallel sides?

What is an 8-sided polygon that has all congruent sides and all congruent angles?

What do you call a 4-sided figure that has 2 pairs of congruent/parallel sides and 4 right angles?

Quadrilaterals

A rhombus has all sides congruent, exhibiting symmetry in its structure.
A square is a special type of rhombus with all angles congruent (90 degrees).
A rectangle is a quadrilateral with all angles being right angles and opposite sides equal; it can also be considered a specific type of parallelogram.
A parallelogram features two pairs of parallel sides, and opposite sides are congruent.
A trapezoid has one pair of parallel sides and can never have both all angles and all sides congruent.

Triangles

An isosceles triangle has two sides that are congruent, giving it an axis of symmetry.
An obtuse triangle contains one obtuse angle (greater than 90 degrees) along with two acute angles (less than 90 degrees).
A right triangle consists of one right angle (90 degrees) and two other angles that can be acute.

Polygons

A hexagon is defined as a polygon with 6 sides.
A pentagon has 5 sides and is the next polygon with more complexity after the quadrilateral.
An octagon is an 8-sided polygon; a regular octagon has all sides and angles congruent, creating a highly symmetrical figure.

Angle Types in Geometry

Acute angles measure less than 90 degrees, while obtuse angles measure more than 90 degrees.
In geometry, figures can be classified based on the types of angles they contain, as seen in various triangle classifications.

Test your knowledge of various geometric shapes with this flashcard quiz. Each card presents a definition or characteristic of a shape, and you must identify the correct term. Ideal for students in geometry classes or anyone looking to brush up on their shape vocabulary.