SaiBook.us Geometry

Lesson

Title: Perimeter of Triangle(based on sides)

Grade: 4-a Lesson: S1-L7

Explanation: Hello students, let us learn a new topic in geometry today with definitions, concepts, examples, and worksheets included.

Lesson:

Definition: Equilateral Triangle

A triangle is a three-sided polygon with three angles and three vertices.

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Explanation: The garden measures 12 m by 8 m, with a total area of 96 square meters.

Definition: Isosceles Triangle

A triangle in which at least two sides have the same length.

The angles opposite the equal sides are congruent.

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Explanation:

The perimeter of an isosceles triangle is 20 cm.(equal side is 8 cm, base length is 4 cm)

Definition: Scalene Triangle

A scalene triangle has sides of different lengths and angles.

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Explanation: The perimeter of the scalene triangle is 30 cm.(sides are 10 cm , 15 cm ,5 cm)