[Solved] The length of line placed in profile plane and making an angle of 155 degrees with the horizontal is 3 cm from top view. What is the actual length?

Q.	The length of line placed in profile plane and making an angle of 155 degrees with the horizontal is 3 cm from top view. What is the actual length?
A.	3.31 cm
B.	7.09 cm
C.	1.26 cm
D.	2.7 cm
Answer» A. 3.31 cm
Explanation: the line is making 155 degrees is equal to the line making 25 degrees as 180- 155 =25. the length of line from top view will be cosine of actual length. l * cosine (25) =3 cm, l= 3/ cosine (25)= 3.31 cm.

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