"Understanding Triangles" Triangle PPT Courseware 2

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"Understanding Triangles" Triangle PPT Courseware 2

When the students in the carpentry group repair tables and chairs, they often nail a wooden strip diagonally under the tables and chairs. Why do they do this?

Utilize the stability of the triangle to make tables and chairs stronger.

Draw a perpendicular line from a vertex of a triangle to its opposite side. The line segment between the vertex and the vertical foot is called the height of the triangle. This opposite side is called the base of the triangle.

judge.

⑴The figure composed of three line segments is a triangle.

⑵A triangle has three sides, three vertices, and three angles.

⑶ Both triangles and quadrilaterals are stable.

⑷The height and base of the triangle are parallel to each other.

Definition: A figure surrounded by three line segments is called a triangle.

Features: three sides, three vertices, three corners

Features: Triangles are stable

Draw a perpendicular line from a vertex of a triangle to its opposite side. The line segment between the vertex and the vertical foot is called the height of the triangle. This opposite side is called the base of the triangle.

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Update Time: 2024-09-22

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

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