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Math Example--Polygons--Quadrilateral Classification: Example 25

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# Math Example--Polygons--Quadrilateral Classification: Example 25

## Topic

Geometry

## Description

This example showcases a quadrilateral labeled ABCD with angles at B and D marked as 60 degrees. Sides AD and BC are labeled y. The shape is identified as a parallelogram. This classification is based on the fact that both pairs of opposite angles are congruent, which means opposite sides are parallel, a defining property of parallelograms.

Quadrilateral classification is a fundamental concept in geometry that helps students understand the properties and relationships of four-sided shapes. By analyzing various examples, students learn to identify key characteristics such as side lengths, angle measures, and the relationships between them. This collection of examples provides a comprehensive overview of different quadrilateral types, allowing students to develop their analytical skills and geometric reasoning.

Studying multiple worked-out examples is essential for students to fully comprehend the concept of quadrilateral classification. Each example presents a unique set of characteristics, challenging students to apply their knowledge and critically evaluate the given information. This approach helps reinforce understanding, improve pattern recognition, and develop problem-solving skills in geometry.

**Teacher's Script: **In this example, we're given information about two angles and two sides of the quadrilateral. How does the congruence of opposite angles relate to the classification of this shape as a parallelogram? Can you explain why having congruent opposite angles means that opposite sides are parallel? What can we infer about the other two angles that aren't marked? How does the labeling of sides AD and BC as y support the parallelogram classification?

For a complete collection of math examples related to Quadrilateral Classification click on this link: __Math Examples: Quadrilateral Classification Collection.__

Common Core Standards | CCSS.MATH.CONTENT.7.G.B.5, CCSS.MATH.CONTENT.4.G.A.2, CCSS.MATH.CONTENT.5.G.B.4, CCSS.MATH.CONTENT.3.G.A.1 |
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Grade Range | 3 - 7 |

Curriculum Nodes |
Geometry• Quadrilaterals• Definition of a Quadrilateral |

Copyright Year | 2013 |

Keywords | quadrilaterals, classification |