Capital letters that have parallel lines include "H," "I," and "E." These letters have horizontal lines that are parallel to each other. The letter "H" has two parallel horizontal lines, the letter "I" has one, and the letter "E" has three parallel lines.
E,f,h,i,n
Order 2.
z
The letter "Z" has two acute angles. An acute angle is any angle that measures less than 90 degrees, and the two angles in the letter "Z" are less than 90 degrees. Each acute angle in the letter "Z" is formed by the intersection of two line segments at a point where the interior angles are less than 90 degrees.
Z
Z
How about Z, E or F
The letter z is one which has no lines of symmetry so the answer is 0.
1
When two parallel lines are intersected by a transverse line, they form eight angles. You can consider the parallel lines as the horizontal lines of the letter Z and the transversal as the sloped line of Z. Then the two angles in that Z-shape are the Z angles. The transversal for Z-angles can slope either way. It can be proved that Z-angles, properly called ALTERNATE angles, are equal.
There are no perpendicular lines in the letter Z
No.
No
A zero slope is horizontal or flat, and an undefined slope is vertical or straight up and down. While this answer is in the textbook and notebook of anyone studying the subject, it is easy to get the two mixed up on test day. Try the following mnemonic (memory aid): Look at the letters "z" for zero, and "u" for undefined. The top and bottom of the letter Z are horizontal lines. The two sides of the letter U are vertical lines.
Any two lines that meet must be in a plane. The plane may not necessarily be horizontal or vertical such as X-Y or X-Z or Y-Z
z