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    Everything You Need to Know About Octagon Shape

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    What is an octagon shape?

    An octagon is a shape with eight sides and eight corners. The word “octagon” comes from two Greek words that mean “eight” and “corner.” Octagons can be the same on all sides and corners, or they can be different. Octagons are found in many places in nature and people’s creations. Some examples of natural octagons are the parts of some flowers, the skin of a snake, and the holes in a bee’s home. Some examples of artificial octagons are stop signs, red and green lights, and the picture on the money of the United States.

    Octagon Shape

    What are some facts about octagons?

    The inside corners of an octagon add up to 1080 degrees.

    You can find this by using this math rule: 180 times (n-2) = 1080,

    Where n is the number of sides in the shape.

    The outside corners of an octagon add up to 360 degrees. This is true for any shape with straight sides. 

    The space inside an octagon

    The space inside an octagon is called the interior of the octagon. The octagon’s sides enclose an octagon’s interior.

    What are the types of octagons?

    There are two main types of octagons:

    1. Regular Octagons – Regular octagons have all sides of equal length and all angles of equal measure. This means that each interior angle of a normal octagon measures 135°. A typical example of a regular octagon is a standard eight-sided gazebo in parks and gardens.

    2. Irregular Octagons – Irregular octagons have sides of different lengths and angles of other measures. For example, a starfish is an irregular octagon.

    In addition to these two main types, there are also other types of octagons, such as:

    • Convex Octagons – Convex octagons have all interior angles less than 180°. This means that they bulge outwards. For example, a regular octagon is a convex octagon.
    • Concave Octagons – Concave octagons have at least one interior angle greater than 180°. This means that they bulge inwards. For example, a starfish is a concave octagon.
    • Isogonal Octagons –  Isogonal octagons have all angles of equal measure, but the sides may be of different lengths. For example, a regular octagon is an isogonal octagon.
    • Isosceles Octagons – Isosceles octagons have all sides of equal length, but the angles may be of different measures. For example, a stop sign is an isosceles octagon.

    The type of octagon is determined by the lengths and angles of its sides. If all sides are equal in length and all angles are equal in measure, then the octagon is regular. If the sides are not all equal in length or the angles are not equal in measurement, then the octagon is irregular.

    What are some uses of octagons?

    Octagons have many uses. They are often used in making buildings, machines, and things that look nice. Octagons are often used in constructing buildings and other things that stand up. They are a good choice for round things, like roofs, towers, and other things that must be strong and steady. Octagons are also used in making machines. They are a standard shape for bridges, water tanks, and other things that must be strong and light. Things that look nice Octagons are also used in making things that look nice. They are a good choice for furniture, floors, and other things that must be pretty and practical. 

    Why are octagons good?

    Octagons have some advantages over other shapes. They are: Strong and steady Octagons are solid and stable in shape. This is because they have eight sides, which helps to share the weight evenly. Space-saving Octagons are also very good at saving space. They fit more space than a square with the same distance around them, which makes them a good choice for buildings and other things that need to use space well. Pretty Octagons are also a beautiful shape. They are often seen as new and relaxed than different shapes, like squares and rectangles.

    Recommended Reading: IMPORTANT MATH FORMULAS STUDENTS SHOULD KNOW

    Area of Regular Octagon

     The area of a regular octagon is the amount of space enclosed by its eight sides. 

    The formula can calculate the area of a regular octagon::

    Area = 2 * s² * (1 + √2)

    Where:

    • S = length of one side of the octagon
    • √2 is the square root of 2

    We can divide the octagon into eight isosceles triangles to derive this formula. The base of each triangle is equal to the side length of the octagon, and the height of each triangle is equal to the distance from the center of the octagon to the midpoint of one of its sides. The area of each triangle is then equal to:

    Area = (1/2) * s * s * √2

    The area of the entire octagon is then equal to 8 times the area of one triangle, or:

    Area = 8 * (1/2) * s * s * √2 = 2 * s² * (1 + √2)

    For example, if the side length of a regular octagon is 5 cm, then the area of the octagon would be:

    Area = 2 * 5² * (1 + √2) = 120.71 cm²

    The area of the interior of an octagon can also be calculated by dividing the octagon into eight congruent isosceles triangles and summing the areas of the triangles.

    • Placing objects inside the octagon
    • Decorating the interior of the octagon
    • Creating a sense of space and openness
    • Providing a place for people to gather

    Here are some examples of how to use the area of a regular octagon formula:

    • Find the area of a regular octagon with a side length of 6 cm.
    • Find the area of a regular octagon with an interior angle measure of 135°.
    • Find the area of a regular octagon with a perimeter of 36 cm.
    • I hope this explanation was helpful! Let me know if you have any other questions.

    The Perimeter of an Octagon

    The perimeter of an octagon is the total length of all its sides. The formula for the perimeter of a regular octagon is:

    Perimeter = 8 * s

    Where:

    • s is the length of one side of the octagon

    For example, if the side length of a regular octagon is 5 cm, then the perimeter of the octagon would be:

    Perimeter = 8 * 5 = 40 cm

    Perimeter of an Octagon

    Here are some examples of how to use the perimeter of an octagon formula:

    • Find the perimeter of a regular octagon with a side length of 6 cm.
    • Find the perimeter of a regular octagon with an interior angle measure of 135°.
    • Find the perimeter of a regular octagon with an area of 120.71 cm².

    The perimeter of an octagon can also be found by measuring the length of each side of the octagon and adding them all together. However, the formula is much quicker and easier to use.  

    Summary

    Octagons are a valuable and excellent shape that has many uses. They are strong, space-saving, and pretty, making them a good choice for many projects.  

    More Information Here are some more things to know about octagons:

    • The word “octagon” comes from the Greek words “octo,” meaning “eight,” and “gon,” meaning “angle.”
    • The Temple of Artemis in Ephesus was the first octagonal building in the 6th century BC.
    •  The octagon is a standard shape in nature, showing up in the parts of some flowers, the skin of a snake, and the holes in a bee’s home.
    • The octagon is a popular shape for buildings and other things, like the picture on the money of the United States, the roof of a holy place, and an old wind tower.
    • The octagon is sacred in many cultures, including Hinduism, Buddhism, and Christianity.
    • The octagon is also famous in architecture, engineering, and design.

    I hope this is helpful! Let me know if you have any other questions.

    Moonpreneur understands the needs and demands this rapidly changing technological world is bringing with it for our kids. Our expert-designed Advanced Math course for grades 3rd, 4th, 5th, and 6th will help your child develop math skills with hands-on lessons, excite them to learn, and help them build real-life applications. 

    Register for a free 60-minute Advanced Math Workshop today!

    Moonpreneur

    Moonpreneur

    Moonpreneur is an ed-tech company that imparts tech entrepreneurship to children aged 6 to 15. Its flagship offering, the Innovator Program, offers students a holistic learning experience that blends Technical Skills, Power Skills, and Entrepreneurial Skills with streams such as Robotics, Game Development, App Development, Advanced Math, Scratch Coding, and Book Writing & Publishing.
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    2 Comments
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    Bella
    Bella
    5 months ago

    Does anybody know what the octagon symbolizes?

    Rudy
    Rudy
    5 months ago
    Reply to  Bella

    The octagon is religious symbols for rebirth and resurrection.

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