Question

A line of length 10 cm parallel to horizontal plane and inclined to vertical plane with an angle of 25 degrees. What is the length in front view?

(a) 10 cm

(b) 0 cm

(c) 9.06 cm

(d) 4.22 cm

The question was posed to me in my homework.

My question comes from Projection of Line Inclined to one Plane and Parallel to other topic in division Projection of Lines of Engineering Drawing

Answer 1

Right option is (c) 9.06 cm

The explanation is: Here accordingly the conditions given that line is parallel to horizontal plane and inclined to vertical plane at 25 degrees the front view’s length is the cosine of actual length. 10 cm x cos (25) = 9.06 cm.