![]() In the second figure, on the other hand, the sides and angles are unequal, which makes the second figure an irregular polygon.Īdd that there are a lot more polygons on the list, and as mentioned, each polygon is named according to the number of its sides.Įxplain that a circle is a closed plane figure. Point out that in the first figure, all sides and angles are equal, so this is a regular polygon. ![]() All the sides and angles or regular polygons are equal, while irregular polygons have unequal sides and angles. It also has 8 angles that can be equal.Įxplain that 2-dimensional figures such as polygons are classified into two categories: regular and irregular polygons. Explain that this is a 2-dimensional figure that has 8 sides that can be equal. Point out that a heptagon is a 2-dimensional figure that has 7 sides that can be equal, in addition to 7 angles that can be equal.ĭraw an example of an octagon on the whiteboard. ![]() Every rectangle has 4 right angles.ĭraw an example of a heptagon on the whiteboard. ![]() It’s a 2-D figure that has 2 pairs of opposite sides that are congruent, as well as 4 vertices and 2 pairs of parallel sides. Add that a square is a 2-dimensional figure that has 4 equal sides, 4 vertices, 2 pairs of parallel sides, and 4 right angles.ĭraw a rectangle and add that this is a type of quadrilateral. Every parallelogram also has 2 pairs of opposite sides that are equal, as well as 2 pairs of opposite angles that are equal.ĭraw a square and point out that it falls into the category of quadrilaterals. It has 4 sides, 4 vertices, 2 pairs of opposite sides that are parallel. Add that a quadrilateral is just a flat figure with four sides, all of which connect up and are straight.ĭraw a parallelogram and point out that this is a quadrilateral and thus a 2-D figure. See Also SEO Tools: Die besten Lösungen, mit denen SEO einfach wird Top 20 FREE SEO Tools Made By Google (Updated 2022) Get Away With 뜻 | Get Away + 전치사 다양한 뜻과 사용법 | 미국영어 | 고급영어 | 원어민영어 상위 202개 베스트 답변 - Sk. What Does ‘Cleaned’ Mean in Mailchimp? What are Cleaned Contacts?ĭraw a quadrilateral on the whiteboard and explain that a quadrilateral is a 2-dimensional figure that has 4 sides and 4 vertices. So polygon means ‘many angles’, and this refers to the angles formed by the straight lines (or sides) of the polygon. Point out that in Greek, ‘poly’ means ‘many’, whereas ‘gon’ means ‘angle’. Thus, we have triangles, squares, rectangles, etc.Īsk students to reflect on the word polygon. It’s a 2-dimensional figure whose name is based on the number of its sides. Explain that a polygon is a closed plane figure, formed by connecting segments that are called ‘sides’. These properties make each 2-dimensional figure special, while there are also some that share common characteristics.Īdd that one example of 2-D figures are polygons. Point out that there are many 2-dimensional figures around us and that each of them has its own unique properties. If students understand the difference between 2-dimensional and 3-dimensional shapes, they should be able to recognize that the cylinder and rectangular prism have height in addition to length and width, and are not flat, hence they’re not 2-dimensional objects. While 2-dimensional shapes are flat figures with length and width, 3-dimensional shapes are solid figures with length, width, and height.ĭraw an example on the whiteboard where there are both 2-dimensional figures and 3-dimensional figures and ask students to circle the 2-dimensional ones. You can draw a distinction between the two to make things clearer. Students have also encountered 3-dimensional shapes. You can include shapes such as the following: If you have manipulatives or images, even better. Add that there are many different 2-dimensional shapes and draw examples of such shapes on the whiteboard. ![]() By now, students have come across many 2-dimensional shapes. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |