4-Sided Polygons | Overview & Shapes - Lesson - Study.com
2023年11月21日 · A polygon is a closed shape that has more than 3 sides. A polygon with 4 sides is called a quadrilateral. Any shape that is closed and has 4 sides is a quadrilateral, but there …
Irregular Polygon | Definition, Characteristics & Examples
2023年11月21日 · 1:27 N-Sided Regular and… 3:06 Example; 3:57 Lesson ... Triangle EFG is regular because each angle measures 60 degrees and all side lengths are 3 units. This …
Diagonals of a Polygon | Formula & Examples - Lesson - Study.com
2023年11月21日 · In the case of 4-sided polygons, a diagonal can be cut into two congruent triangles, as shown in Figure 3. Figure 3: Congruent triangles A and B. Diagonals of a Polygon
Angles in a Polygon | Measurement, Formula & Examples
2023年11月21日 · Let's find out. Our regular polygon is a triangle with 3 sides, so our n equals 3. We plug that into our equation, and we get (3 - 2) * 180 / 3 = 1 * 180 / 3 = 180 / 3 = 60. Look at …
Rotational Symmetry & Reflection of Polygons - Lesson - Study.com
2023年11月21日 · A square is a regular 4-sided polygon and therefore has four lines of symmetry (vertical, horizontal and both diagonals), an order of four, and an angle of rotation of 90 …
What is a 3-sided shape called? - Homework.Study.com
What is a 12-sided polygon called? What shape has 6 vertices and 9 edges? What shape is not equiangular? What shape has 7 sides and 7 vertices? What shape can you make with a …
What is a Polygon? | Definition, Types & Examples - Lesson
2023年11月21日 · A triangle is a three-sided polygon, and a quadrilateral is a four-sided polygon. Quadrilaterals have several variations, such as parallelograms, trapezoids, rectangles, …
Regular Polygon | Definition, Sides & Types - Lesson - Study.com
2023年11月21日 · A three-sided polygon is called a triangle. A regular three-sided polygon is called an equilateral triangle. This triangle has three sides of equal length and all three interior …
Properties of Triangles | Sides, Angles & Types - Study.com
2023年11月21日 · The basic properties of triangles are that a triangle has 3 sides and 3 angles. ... But what exactly is a triangle? A simple definition of a triangle would be any closed, 3-sided …
Convex & Concave Quadrilaterals | Overview, Examples & Attributes
2023年11月21日 · A quadrilateral is a four sided polygon that can be classified in several categories based on its properties. Quadrilaterals can be categorized as convex or concave. If …