"Classification of Triangles" Triangle PPT Courseware 2

Description

"Classification of Triangles" Triangle PPT Courseware 2

teaching objectives

In this lesson, we mainly study the classification of triangles. Students must understand and master the categories of triangles, what characteristics each category of triangles has, and how they can solve related practical problems.

fill in the blank

∠1, ∠2, ∠3 are the interior angles of a triangle.

1. If ∠1=32°, ∠2=42°, it is a ( ) triangle.

2. If ∠1=35°, ∠2=55°, it is a ( ) triangle.

3. If ∠1=62°, ∠2=65°, it is a ( ) triangle.

isosceles triangle

A triangle with two equal sides.

feature

Both waists are of equal length.

The measures of the two base angles are equal.

judge

1. A triangle has at least two acute angles.

2. An equilateral triangle must be an acute triangle.

3. The height of the triangle must be longer than the base.

4. The base angle of a triangle is 30°. This triangle is an acute triangle.

5. The vertex angle of a triangle is 30°. This triangle is an acute triangle.

6. An isosceles triangle with a vertex angle of 60° is an equilateral triangle.

7. The base angle of an isosceles triangle and a right triangle must be 45°.

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For more information about the "Classification of Triangles and Triangles" PPT courseware, please click on the "Triangles ppt Classification of Triangles ppt" tag.

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File Info

Update Time: 2024-08-30

This template belongs to Mathematics courseware Western Normal University Edition Fourth Grade Mathematics Volume 2 industry PPT template

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