Difference between revisions of "Classification of triangles"
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==Acute angled triangle. == | ==Acute angled triangle. == | ||
| − | A triangle whose all | + | A triangle whose all angles are acute is called an acute-angled triangle or simply an acute triangle. |
| − | angles are acute is called an acute-angled triangle or simply an acute triangle. | ||
[[Image:KOER%20Triangles_html_m62898a77.png]] | [[Image:KOER%20Triangles_html_m62898a77.png]] | ||
| − | [[Image:KOER%20Triangles_html_m732d9c3d.png]]A right triangle has one angle 90° | + | ==Right angle triangle== |
| − | + | [[Image:KOER%20Triangles_html_m732d9c3d.png]] A right triangle has one angle 90° | |
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| + | ==Right Isosceles Triangle== | ||
| − | + | [[Image:KOER%20Triangles_html_m37b6213c.png]] | |
| − | =The Obtuse Triangle= | + | If a triangle has a right angle (90°), and also two equal angles, can you guess what the equal angles are? |
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| + | ==The Obtuse Triangle== | ||
[[Image:KOER%20Triangles_html_15a07649.png|Obtuse Triangle]] | [[Image:KOER%20Triangles_html_15a07649.png|Obtuse Triangle]] | ||
The Obtuse Triangle has an obtuse angle (an obtuse angle has more than 90°). In the picture on the left, the shaded angle is the obtuse angle that distinguishes this triangle. Since the total degrees in any triangle is 180°, an obtuse triangle can only have one angle that measures more than 90°. | The Obtuse Triangle has an obtuse angle (an obtuse angle has more than 90°). In the picture on the left, the shaded angle is the obtuse angle that distinguishes this triangle. Since the total degrees in any triangle is 180°, an obtuse triangle can only have one angle that measures more than 90°. | ||
| − | + | =Angles in a triangle= | |
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== Interior angles of a triangle == | == Interior angles of a triangle == | ||
| − | The interior angles are | + | The interior angles are those on the inside of the triangle. |
| − | those on the inside of the triangle. | ||
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[[Image:KOER%20Triangles_html_m55b3a2cf.png]] | [[Image:KOER%20Triangles_html_m55b3a2cf.png]] | ||
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== Exterior Angles of a triangle == | == Exterior Angles of a triangle == | ||
| − | An exterior angle is formed by extending any side | + | An exterior angle is formed by extending any side of the triangle. |
| − | of the triangle. | + | [[Image:KOER%20Triangles_html_9fb9ff3.png]] |
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| − | + | '''Image Acknowledgement: Mathsisfun.com''' | |
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Revision as of 06:52, 6 December 2013
Triangles differentiated on the basis of their sides
Equilateral Triangles:
A triangle with all sides equal to one another is called an equilateral triangle.
Isosceles Triangle:
A triangle with a pair of equal sides is called an isosceles triangle.
Scalene Triangle:
A triangle in which all the sides are of different lengths and no two sides are equal, the triangle is called a scalene triangle.
Triangles differentiated on the basis of their angles.
Acute angled triangle.
A triangle whose all angles are acute is called an acute-angled triangle or simply an acute triangle.
Right angle triangle
A right triangle has one angle 90°
Right Isosceles Triangle
If a triangle has a right angle (90°), and also two equal angles, can you guess what the equal angles are?
The Obtuse Triangle
The Obtuse Triangle has an obtuse angle (an obtuse angle has more than 90°). In the picture on the left, the shaded angle is the obtuse angle that distinguishes this triangle. Since the total degrees in any triangle is 180°, an obtuse triangle can only have one angle that measures more than 90°.
Angles in a triangle
Interior angles of a triangle
The interior angles are those on the inside of the triangle.
Exterior Angles of a triangle
An exterior angle is formed by extending any side of the triangle.
Image Acknowledgement: Mathsisfun.com