In other words, it is impossible to tell two congruent items apart because they are exactly the same. Two shapes that are congruent are identical. For shapes, it is an object with the same shape and size. What is congruence? In simple terms, it means equal. Finally, they can hunt for congruent shapes in the classroom and use congruent shapes to make an artistic masterpiece. Then, using everyday shapes kids can categorize congruent, similar and unlike objects. Through these lessons, they can identify congruent objects and define congruency. It is also available on the author’s YouTube, here.These congruency activities for third grade help kids become active learners. This video has been added and used with the author’s permission. Video created by Sharmeen Niazi (Archgate Montessori Academy, Plano, TX)Įlementary | Math | Geometry | Equivalency (English) Watch the video to understand the difference between congruency, similarity, and equivalency with the help of insets.įor more mathematical lessons, click here. Paste a thumb pin to the cut-outs for easy hold.Cut one of the squares diagonally to get two triangles.Take a cardboard and cut it into two equal triangles, two different sized rectangles, and two squares.This video also guides children to create an Equivalence Cabinet at home. The final insets teach the children about the Pythagorean Theorem and the mathematical formulas of Euclid, the Greek mathematician who is historically considered the “father of geometry.” Then the children learn the formula for calculating the area of shapes such as the rhombus and triangle. The look of equivalency cabinets is the same as Metal Inset and Fraction Inset materials.įirstly, Geometric concepts such as congruency, similarity, and equivalence of shapes are introduced with these various illustrations. Each drawer contains a different collection of insets. The Insets of Equivalence Cabinet is one of the fascinating collections of materials in the Montessori Elementary environment. This material consists of 13 green metal trays each tray has a set of red metal insets. It helps understand the relationship of equivalent figures, leading to the discovery of area and theorems. The Equivalent Figure Material is also known as Insets of Equivalence Cabinet. What are the Insets of Equivalence Cabinet? In this video, the triangles, rectangles, and squares used to understand the concept are called Insets of Equivalence Cabinets. It also helps them in understanding the workfow of economy, finance, and various business operations. These concepts help the child to build social connections and research for reasons behind the facts. The video shows how two triangles together form a square (same size) and occupy the same space are equivalent.Ĭongruency, similarity, and equivalency are fundamental concepts that deal with relationships. Thus, they are similar rectangles.Īny two objects of the same size, occupy the same space, and have different shapes are equivalent. The video shows how the two rectangles have the same shape but don’t have the same size and don’t occupy the same space. The video shows the child a pair of triangles and tells them how they are congruent.Īny two or more objects that are identical in shape are similar. What is Congruency?Īny two or more objects that are identical in every respect: same size, same shape, and occupy same space are congruent. Let us understand each concept one by one. It also guides the child to create their own insets at home. It helps them understand the geometric concept of similarity, congruency, and equivalency and how they differ using insets. This video lesson is designed for 6-12-year-old children.
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