"Classification of Triangles" Triangle PPT Courseware

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"Classification of Triangles" Triangle PPT Courseware

Looking at the table above, how many categories can these triangles be divided into? How to divide? Communicate in groups.

A triangle with three acute angles is an acute triangle.

A triangle with one right angle is a right triangle.

A triangle with one obtuse angle is an obtuse triangle.

If the largest angle in a triangle is an acute angle (right angle, obtuse angle), then the triangle is an acute angle (right angle, obtuse angle) triangle.

Is the following statement correct? Give reasons.

(1) A triangle with three obtuse angles is an obtuse triangle. ……………… ( )

(2) There is only one right angle in a right triangle. …………………………( )

(3) A triangle whose largest angle is an acute angle is an acute triangle. ………………( )

Think of all triangles as a whole. Acute triangles, right triangles and obtuse triangles are all part of this whole. The relationship between them can be represented by the following figure.

draw a picture

Draw a triangle at will, take a look at it, compare it with a triangle ruler, and tell what kind of triangle it is.

discount

Using a rectangular piece of paper, fold two identical right triangles.

Cut it

How should we cut the parallelogram below into two identical acute-angled triangles? How about cutting it into two identical obtuse triangles?

draw a picture

Can you draw a line segment in each of the triangles below to divide it into two right triangles?

Draw a line segment in the right triangle to divide it into two triangles. What kind of triangles did you divide into two? How else can we divide it?

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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.

"Classification of Triangles" Triangle PPT Courseware 3:

"Classification of Triangles" Triangle PPT Courseware 3 According to the characteristics of the angles of triangles Acute triangle: A triangle in which all three angles are acute. Right triangle: A triangle with one right angle. Obtuse triangle: A triangle with one obtuse angle. ... .....

"Classification of Triangles" Triangle PPT Courseware 2:

"Classification of Triangles" Triangle PPT Courseware 2 Teaching Objectives In this lesson we will mainly learn 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 relevant practical problems. question. Fill in the blanks ..

"Classification of Triangles" Triangles, Parallelograms and Trapezoid PPT Courseware 3:

"Classification of Triangles" Triangle Parallelogram and Trapezoid PPT Courseware 3 (1) A figure consisting of three line segments ( ) is called a triangle. (2) A triangle has three ( ) and ( ) angles. (3) The triangle in ( ) is called an acute triangle. (4) There is a corner...

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Update Time: 2024-11-22

This template belongs to Mathematics courseware People's Education Press fourth grade mathematics volume 2 industry PPT template

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