# Oblique

Pronunciation: /oʊˈblik/ Explain
1. An angle is oblique if it is not a multiple of 90°.
 Click on the blue points and drag them to change the figure. Use the grid lines to find 90 degrees, 180 degrees, and so on. How many non-oblique angles are there in 360 degrees? Manipulative 1 - Oblique Angle Created with GeoGebra.
2. Two lines are oblique if they are neither perpendicular or parallel.
 Click on the blue points and drag them to change the figure. Use the grid as a guide for making parallel and perpendicular lines. When are the lines oblique? When are the lines not oblique? Manipulative 2 - Oblique Lines Created with GeoGebra.
3. A geometric figure is oblique if the center of the top or the apex is not directly over the center of the base.
 Click on the blue point and drag it to change the figure. When is the figure oblique? When is the figure not oblique? Manipulative 3 - Oblique Figure Created with GeoGebra.

### References

1. McAdams, David E.. All Math Words Dictionary, oblique. 2nd Classroom edition 20150108-4799968. pg 128. Life is a Story Problem LLC. January 8, 2015. Buy the book