Acute and obtuse triangles - Wikipedia
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![](https://upload.wikimedia.org/wikipedia/commons/thumb/7/72/Triangle.Right.svg/1200px-Triangle.Right.svg.png)
![](https://d138zd1ktt9iqe.cloudfront.net/media/seo_landing_files/obtuse-angle-triangle-1642162574.png)
Obtuse Angle - Definition, Degree
![](https://cdn1.byjus.com/wp-content/uploads/2019/03/Obtuse-Angled-Triangle-Definition.png)
Obtuse Angled Triangle - Definition, Formula, Properties & Example
![](https://upload.wikimedia.org/wikipedia/commons/thumb/3/32/Isosceles-right-triangle.jpg/220px-Isosceles-right-triangle.jpg)
Triangle - Simple English Wikipedia, the free encyclopedia
![](https://upload.wikimedia.org/wikipedia/commons/thumb/3/3e/Thm_mediane.svg/300px-Thm_mediane.svg.png)
Right triangle - Wikipedia
![](https://study.com/cimages/multimages/16/obtuse_triangle_height_16177139850740775285.png)
Obtuse Triangle: Area, Examples, and Formulas - Lesson
![](http://704569228360839953.weebly.com/uploads/4/1/0/4/41045473/7081473_orig.jpg)
Transformations and Geometry
![](https://study.com/cimages/multimages/16/drawingobtusetriangleheight.png)
Obtuse Triangle: Area, Examples, and Formulas - Lesson
![](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/0/0c/Triangle-heronian.svg/640px-Triangle-heronian.svg.png&w=640&q=50)
Integer triangle - Wikiwand
![](https://upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Example_figure_of_Calabi_triangle_02.svg/220px-Example_figure_of_Calabi_triangle_02.svg.png)
Calabi triangle - Wikipedia
![](https://upload.wikimedia.org/wikipedia/commons/thumb/5/52/Altitudes_and_orthic_triangle_SVG.svg/279px-Altitudes_and_orthic_triangle_SVG.svg.png)
Altitude (triangle) - Wikipedia