"Skillful Little Craftsman" PPT courseware 6

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"Skillful Little Craftsman" PPT courseware 6

1. Situation introduction

What shape is an easel and what are its characteristics?

What questions can you ask?

2. Cooperation and exploration

What shape is the easel?

The easel is trapezoidal.

Think about it, where are the trapezoids in life?

What are the characteristics of a trapezoid?

Based on the research experience of parallelograms, from what aspects can we study the characteristics of trapezoids?

We study the characteristics of a trapezoid in terms of its sides and angles.

An exploration of trapezoidal characteristics

Group work requirements

1. Use the learning tools in hand to study from the sides and corners.

2. As a group, organize the research results in a record sheet.

A trapezoid is also a quadrilateral.

This set of opposite sides is obviously not parallel

There are 4 sides, and the opposite sides are not equal.

There are 4 angles, and the opposite angles are not equal.

3. Independent practice

1. Fill in the blanks according to the graphic requirements.

(1) The parallelogram has ( ).

(2) The trapezoid has ( ).

(3) The isosceles trapezoid has ( ).

(4) A right-angled trapezoid has ( ).

2. Think about the relationship between quadrilateral, parallelogram, trapezoid, isosceles trapezoid and right-angled trapezoid? Can you fill them in the picture below?

3. Measure the upper base, lower base and height of each trapezoid.

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Update Time: 2024-11-24

This template belongs to Mathematics courseware Qingdao Edition Fourth Grade Mathematics Volume 2 industry PPT template

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