A closed plane figre formed by three line segments. [triangles].
Plane Figures | Mathematics Grade 4 | Periwinkle
Plane Figures - Different Shapes | Mathematics Grade 3 | Periwinkle
Polygons
Polygons In The Coordinate Plane
6th Grade Math 14.2a, Polygons in the Coordinate Plane
closed and open figures
Polygons a polygon is a closed curve (figure)formed by the line segments such that : (i)no.
Examples 3,4,5,6/ 9.Area of plane figures/ Class 8/ Telangana mathematics by school maths made easy
Polygons - Geometry for Kids
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Plane and Solid Figures|plane vs solid shapes
TRIANGLE A plane figure formed by three non-parallel line segments is called a triangle.
Plane figures, Solid figures, and Area of Plane figures
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9.Closed figures and Open figures.
OPEN & CLOSED FIGURE ( for nursery to Class 4)
Curve --a plane figure formed by joining a number of points without lifting a pencil from the paper
Polygons in the Coordinate Plane - Lesson 14.2
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