Perimeter and Polygons | Summary and Q&A

1.2K views
November 1, 2020
by
The Math Sorcerer
Perimeter and Polygons

TL;DR

This video provides a basic explanation of different polygons and how to calculate their perimeters.

Key Insights

• 🙃 Polygons are closed figures with three or more sides, and examples include triangles, quadrilaterals, pentagons, hexagons, heptagons, and octagons.
• 🙃 The perimeter of a polygon is the sum of the lengths of its sides, and it is important to include the unit of measurement in the final answer.
• 💠 Calculating the perimeter involves adding up the lengths of all the sides, regardless of the polygon's shape.
• 🇦🇪 The unit of measurement should be consistent throughout the calculation.
• 🇦🇪 Writing the unit of measurement in the final answer is generally preferred.
• 🙃 Different polygons have different names based on the number of sides they possess.
• 🔺 Examples of calculating perimeter are provided for a triangle and a quadrilateral.

Transcript

hi everyone in this video we're going to talk about perimeter and polygons so a polygon is a closed figure with three or more sides let's briefly go over some of the more common polygons so a polygon with three sides is called a triangle so you've probably seen these before it's just three sides something like this a polygon with four sides has a m... Read More

Q: What is a polygon?

A polygon is a closed figure with three or more sides. It can be classified into different types based on the number of sides, such as triangles, quadrilaterals, pentagons, hexagons, heptagons, and octagons.

Q: How do you calculate the perimeter of a polygon?

To calculate the perimeter, you add up the lengths of all the sides of the polygon. Make sure to include the unit of measurement in your final answer.

Q: Is it necessary to write the unit of measurement every time when finding the perimeter?

It is not always necessary, but including the unit of measurement in your answer is generally appreciated, especially in academic or formal contexts.

Q: Can you demonstrate how to find the perimeter of a triangle?

Sure! If you have a triangle with side lengths of 12 inches, 17 inches, and 19 inches, you simply add those lengths together to get the perimeter. In this case, it would be 12 inches + 17 inches + 19 inches = 48 inches.

Q: How do you calculate the perimeter of a quadrilateral?

To find the perimeter of a quadrilateral, add up the lengths of all four sides. For example, if you have a quadrilateral with side lengths of 3 cm, 6 cm, 5 cm, and 4 cm, the perimeter would be 3 cm + 6 cm + 5 cm + 4 cm = 18 cm.

Summary & Key Takeaways

• A polygon is a closed figure with three or more sides, with examples including triangles, quadrilaterals, pentagons, hexagons, heptagons, and octagons.

• The perimeter of a polygon is the sum of the lengths of its sides, and it is important to include the unit of measurement in the final answer.

• Two examples are given, demonstrating how to calculate the perimeter of a triangle and a quadrilateral.