Difference between revisions of "Right angle"
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(Example of a right angle) |
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| − | A '''right angle''' is the [[angle]] formed by two [[perpendicular]] [[line]]s. The [[measure of an angle | measure]] of every right angle is 90 [[degree (geometry) | degrees]] or <math>\frac \pi 2</math> [[radian]]s. | + | A '''right angle''' is the [[angle]] formed by two [[perpendicular]] [[line]]s. The [[measure of an angle | measure]] of every right angle is 90 [[degree (geometry) | degrees]] or <math>\frac \pi 2</math> [[radian]]s. When drawing diagrams, we denote right angles with a little square: |
| + | |||
| + | <asy> | ||
| + | unitsize(2cm); | ||
| + | pair A, B, C, D, I; | ||
| + | |||
| + | A = (1, 0); | ||
| + | B = (-1, 0); | ||
| + | C = (0, 1); | ||
| + | D = (0, -1); | ||
| + | I = (0, 0); | ||
| + | |||
| + | draw(A--B, Arrows); | ||
| + | draw(C--D, Arrows); | ||
| + | draw(rightanglemark(C, I, A, 5)); | ||
| + | </asy> | ||
==See Also== | ==See Also== | ||
| Line 8: | Line 23: | ||
** [[Obtuse angle]] | ** [[Obtuse angle]] | ||
** [[Straight angle]] | ** [[Straight angle]] | ||
| + | ** [[Reflex angle]] | ||
{{stub}} | {{stub}} | ||
| + | |||
| + | [[Category:Definition]] | ||
| + | [[Category:Geometry]] | ||
Latest revision as of 22:59, 11 June 2022
A right angle is the angle formed by two perpendicular lines. The measure of every right angle is 90 degrees or 
radians. When drawing diagrams, we denote right angles with a little square:
![[asy] unitsize(2cm); pair A, B, C, D, I; A = (1, 0); B = (-1, 0); C = (0, 1); D = (0, -1); I = (0, 0); draw(A--B, Arrows); draw(C--D, Arrows); draw(rightanglemark(C, I, A, 5)); [/asy]](http://latex.artofproblemsolving.com/9/9/1/991a66b234c3f63b1f9af7a3a50587d604540e7f.png)
See Also
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