A drawing of a 30 degree angle!
Oblique
30 Degrees
Vertical angles are formed when two lines intersect, creating two pairs of opposite angles. Each pair of vertical angles is equal in measure. For example, if two lines intersect and create angles of 30 degrees and 150 degrees, the angles opposite each other (30 degrees and 30 degrees, 150 degrees and 150 degrees) are the vertical angles. They appear symmetrical across the intersection point.
That's what an isometric drawing is: the third dimension is shown at a 30 degree angle to the horizontal. The number 30 isn't magic - any other number in that 'ballpark' would work - but it's an easy number ( a third of a right angle, and it's clearly different from 60 degrees, which is why 45 degrees wouldn't be great), and the resulting drawing makes the 3-D object easy to visualize.
5 lines
Oblique
30 Degrees
30 degree's and 30 degrees
30 degrees
a regular hexagon
30 150 and 150 (for a total of 360 degrees)
It is an intersecting line because perpendicular lines intersect at 90 degrees
30 degrees north and 90 degrees west
It rotates 90 degrees.
Clicking "Rotate Right" on the Drawing toolbar typically rotates an image by 15 degrees each time. Therefore, if you click it twice, the image will rotate a total of 30 degrees to the right.
Drawing Black Lines was created on 2000-03-21.
Vertical angles are formed when two lines intersect, creating two pairs of opposite angles. Each pair of vertical angles is equal in measure. For example, if two lines intersect and create angles of 30 degrees and 150 degrees, the angles opposite each other (30 degrees and 30 degrees, 150 degrees and 150 degrees) are the vertical angles. They appear symmetrical across the intersection point.