Curated OER
Area of Regular Quadrilaterals
Can your class calculate the area of a regular quadrilateral? They can now, with this handy presentation which provides an explanation, the formula, and examples of finding the area of a regular 2-D shape.Ā
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Perimeters of Quadrilaterals
Students measure perimeter.Ā In this measurement lesson plan, students review how to find the perimeter of an object and discuss how this differs when finding the perimeter of a quadrilateral.Ā Students practice finding the perimeter of...
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Naming Polygons
What polygon is this? Young geometers categorize shapes by circling all the quadrilaterals in a set of figures. Next, they write the names of 10 polygons using a visual guide as reference. Review the guide together before they start if...
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Classify Quadrilaterals
Here is a quadrilateral learning exercise in which learners choose words that describe shapes, words to complete sentences that describe shapes. A reference web site is given for additional activities.Ā
Shodor Education Foundation
An Introduction To Quadrilaterals
Young geometers investigate and apply properties of quadrilaterals. Ā After a review and discussion of key terms, students use a computer applet to explore four-sided figures and classify them according to their attributes. The...
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Symmetries of a Quadrilateral II
Learners investigate the symmetries of a convex quadrilateral in aĀ collaborative activity. Rigid motion and complements are explored as learners analyze different cases of reflections across a line.
Scholastic
Study Jams! Classify Quadrilaterals
Face the vertex of two-dimensional shapes and discover what each figure requires as part of its classification. With one shape per slide, learners see what makes each shape special and compare it to others with similar qualities.Ā
Curated OER
Sea Squares
In this sea squares worksheet, 10th graders solve 5 different problems that include various geometrical figures. First, they draw a number line using one color. Then, students draw 2 obtuse angles and 3 isosceles triangles with different...
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Property Lists for Quadrilaterals
Learners establish classifications of shapes by various properties (angles, sides, etc.). They introduce the important properties of common shapes. Students develop an awareness of the wide variety of ways the 2-D shapes can be alike.
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Quadrilateral Properties
In this online math instructional activity, students answer "true" or "false" to a variety of statements regarding the properties of quadrilaterals. This excellent resource allows the students to check their answers, and to get "hints"...
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How to Classify Quadrilaterals
For this how to classify quadrilaterals worksheet, 3rd graders choose words to describe 3 quadrilaterals and to complete 3 sentences about the shapes.
Curated OER
Properties of Special Quadrilaterals
Teach your mathematicians how to identify the properties of quadrilaterals. In this geometry lesson, students solve for missing angles and sides of a special quadrilateral. They use the TI to move the sides around and create different...
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All About Quadrilaterals
In this quadrilateral post test activity, 7th graders answer ten multiple choice questions by solving questions based on quadrilaterals and angles of quadrilaterals. This is an interactive activity.
Curated OER
Opposite Angles in a Cyclic Quadrilateral
Learners investigate cyclic quadrilaterals in this geometry lesson. They use Cabri Jr to explore the sum of the measures of opposite angles in a cyclic quadrilateral. The dynamic nature of Cabri allows students to form and verify...
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Diagonals of Quadrilaterals
Teach your mathematicians how to identify different polygons basedĀ on theirĀ diagonals. Relating quadrilaterals to the different number of diagonals formed, students use the TI to create a visual of their shape.
Curated OER
Creating a Cyclic Quadrilateral
Identify and make conjecture about properties of cyclic quadrilaterals. Students use the TI Navigator to create different shapes and draw conclusions.
Inside Mathematics
Rhombuses
Just what does it take to show two rhombuses are similar? The assessment task asks pupils to develop an argument to show that given quadrilaterals are rhombuses. Class members also use their knowledge of similar triangles to show two...
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Classifying Quadrilaterals
Fourth and fifth graders learn to classify quadrilaterals and use more than one name for each. They follow the directions and classify three quadrilaterals. There are also activities which can be done with a partner.
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World of Quadrilaterals
Students define the importance of the properties of quadrilaterals. In this quadrilaterals instructional activity, students identify the general properties of and compare and contrast the properties of convex and concave quadrilaterals....
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Quadrilateral Characteristics
Fourth graders explain the characteristics of quadrilaterals and describe, identify and analyze characteristics and properties of geometric shapes.
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Sorting Quadrilaterals
Tenth graders investigate the geometric concept of quadrilaterals. They are given a set of shapes and asked to sort the quadrilaterals from the others. Then working in pairs they discuss the characteristics and write down the description...
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Drawing Quadrilaterals
In this math worksheet, learners draw quadrilaterals and also find the sums of the inner angles for each. They practice drawing rhombuses as unique quadrilaterals.
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Investigating Quadrilaterals
Fourth graders discuss the various attributes of quadrilaterals. In groups, they use the attributes to sort quadrilaterals into different classes and a hierarchy. They review the new vocabulary and attributes with a partner to end the...
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Quadrilateral Review
Students identify the properties of quadrilaterals. In this geometry lesson, students investigate the history of quadrilaterals and different types of quadrilaterals. They identify the length and mid-segment of each shape.
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