Classifying 2D Shapes Flashcards

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Questions and Answers

What does 'poly' mean?

few

none

one

many (correct)

What does 'gons' refer to?

faces

sides (correct)

angles

vertices

What is a polygon?

A closed plane figure formed from line segments that meet only at their end points.

What does 'quad' refer to?

four Signup and view all the answers

What is a quadrilateral?

A four-sided polygon. Signup and view all the answers

What is a rectangle?

A parallelogram with 2 pairs of congruent parallel sides and 4 right angles. Signup and view all the answers

What is a square?

A parallelogram with four congruent sides and 4 right angles. Signup and view all the answers

What is a rhombus?

A parallelogram with all four sides equal in length. Signup and view all the answers

What is a parallelogram?

A quadrilateral with 2 pairs of parallel and congruent sides. Signup and view all the answers

What does 'congruent' mean?

equal Signup and view all the answers

What is an acute angle?

An angle that measures less than 90 degrees. Signup and view all the answers

What is a right angle?

An angle that measures 90 degrees. Signup and view all the answers

What is an obtuse angle?

An angle that measures more than 90 degrees. Signup and view all the answers

What characterizes an acute triangle?

Has 3 acute angles Signup and view all the answers

What classifies a right triangle?

Has 1 right angle and 2 acute angles Signup and view all the answers

What is an obtuse triangle?

Has 1 obtuse angle and 2 acute angles Signup and view all the answers

What does 'equiangular' mean?

Has 3 congruent angles Signup and view all the answers

What is a scalene triangle?

A triangle with no congruent sides. Signup and view all the answers

What is an isosceles triangle?

A triangle with at least 2 congruent sides. Signup and view all the answers

What is an equilateral triangle?

A triangle that has all 3 congruent sides. Signup and view all the answers

Study Notes

Basic Terminology

"Poly" means many, often used in mathematical contexts referring to shapes.
"Gons" refers to sides, indicating the number of sides in a polygon.

Polygons

A polygon is defined as a closed plane figure formed by line segments meeting only at their endpoints.

Types of Quadrilaterals

"Quad" signifies four, a term related to quadrilaterals.
Quadrilaterals are four-sided polygons with specific properties.

Parallelograms

A parallelogram features two pairs of parallel and congruent sides.
A rectangle is a specific type of parallelogram with four right angles and two pairs of congruent sides.
A square is a special rectangle where all four sides are congruent.
A rhombus is a parallelogram where all four sides are equal in length.

Angles

Acute angles measure less than 90 degrees.
Right angles measure exactly 90 degrees.
Obtuse angles measure more than 90 degrees.

Triangles

Acute triangles contain three acute angles, all measuring less than 90 degrees.
Right triangles have one right angle and two acute angles.
Obtuse triangles possess one obtuse angle and two acute angles.
An equiangular triangle has three congruent acute angles.
Scalene triangles are characterized by having no congruent sides.
Isosceles triangles have at least two congruent sides.
Equilateral triangles feature three congruent sides, making all angles equal.

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Description

Test your knowledge of 2D shapes with these flashcards. This quiz covers terms related to polygons, including definitions and characteristics of various shapes. Perfect for students learning geometry!