Question

Define triangle(definition for class 9)

Answer 1

Step-by-step explanation:

Triangles - Class 9 : Notes. (1) Triangle : It is a closed figure formed by three intersecting lines. It has three sides, three angles and three vertices. ... Here, ∆ ABC have three sides AB, BC, CA; three angles ∠ A, ∠ B, ∠ C and three vertices A, B, C.

Answer 2

Answer:

A PLANE FIGURE WITH THREE STRAIGHT SIDES AND THREE ANGLES.

Step-by-step explanation:

CLASS 9 HAS HERONS FORMULA WHERE AREA OF TRIANGLE IS CHANGED BUT THE DEFINITION REMAINS SAME.

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