Question

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Class:- 9
Chapter:- Lines and Angles
Question:- Notes on planes​

Answer 1

Hi mate, i am not sure about my answer but :-

Just Imagine!!! You are living in a two-dimensional plane, and in this world has no height. You could still travel around, visit your friends. You could measure distances and angles. You could move fast or slow. You could go forward and backward or sideways. You could move in straight lines, circles, or anything so long as you never go up or down. What would be your life like living in two dimensions plane? Well, for me it's impossible to imagine. And that is the reason why Three Dimension Geometry is important and necessary to learn their properties. In the real world, everything you see is in a three-dimensional shape, it has length, breadth, and height. Just simply look around and observe. Even a thin sheet of paper has some thickness.

Answer 2

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Angle. An angle is formed when two lines intersect each other. ... An angle involves two legs and one common vertex at which two lines meet. For example: ∠AOD is formed when line AB and CD intersect with each other. Also, ∠AOD is formed between the leg AO and OD, so we include A, O, and D while naming the angle.

Yes

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