Angle of depression is the angle between the horizontal plane and the nbsp-line from the observer-s eye to some object above his eye-FalseTrue

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Standard X

Mathematics

Horizontal Level and Line of Sight

Angle of depr...

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Angle of depression is the angle between the horizontal plane and the line from the observer’s eye to some object above his eye.

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Q. Angle of depression is the angle between the horizontal plane and the line from the observer’s eye to some object above his eye.

Match the following.
$\begin{matrix} i) horizontal & a) is the angle between line of sight and the horizontal level & level when the object is above the horizontal line. ii)line of sight & b) is the line running parallel to the plane on which the object is kept. iii) angle of & c) is the line drawn from the eye of the observer to the elevation & point in the object viewed by the observer. iv) angle of & d) is the angle between line of sight and the horizontal depression & level when the object is below the horizontal line. \end{matrix}$

The angle of depression is the angle between the line of sight of an observer below his horizontal line of sight.

The angle of ___ is the angle between the line of sight of an observer and the object above his horizontal line of sight.

Q. Match the following.

\begin{matrix} i) h o r i z o n t a l & a) i s t h e a n g l e b e t w e e n l i n e o f s i g h t a n d t h e h o r i z o n t a l l e v e l & l e v e l w h e n t h e o b j e c t i s a b o v e t h e h o r i z o n t a l l i n e . i i) l i n e o f s i g h t & b) i s t h e l i n e r u n n i n g p a r a l l e l t o t h e p l a n e o n w h i c h t h e o b j e c t i s k e p t . i i i) a n g l e o f & c) i s t h e l i n e d r a w n f r o m t h e e y e o f t h e o b s e r v e r t o t h e e l e v a t i o n & p o i n t i n t h e o b j e c t v i e w e d b y t h e o b s e r v e r . i v) a n g l e o f & d) i s t h e a n g l e b e t w e e n l i n e o f s i g h t a n d t h e h o r i z o n t a l d e p r e s s i o n & l e v e l w h e n t h e o b j e c t i s b e l o w t h e h o r i z o n t a l l i n e . \end{matrix}

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