Math Plane
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Triangle Characteristics
The following are brief notes and illustrations of triangle properties.
Click to select (enlarged) image.
Right click to view or copy to desktop.
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Download Free Complete Triangle Properties and Characteristics .pdf file
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Geometry Chain Letters
Check out samples, or download the packet and support the mathplane sites. (Thanks!)
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6 more triangle questions:
1) What is the name of a triangle where all sides have different lengths?
2) A triangle has sides of length 8 and 13. What are the possible lengths of the 3rd side?
3) Two sides of an isosceles triangle are 5 and 7 feet. What is the perimeter of the triangle?
4) DEF is a right triangle. If angle E is 37 degrees, what are the measures of D and F?
5) Where do the altitudes of a right triangle intersect?
6) If the 3 altitudes of triangle ABC intersect outside the triangle, what type of triangle is ABC?
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Connections
Find Math Definitions such as types of triangles at mathwords.com
Median, altitude, and bisectors; Definitions, illustrations, and properties of triangles; Practice test and solutions from mathplane.com
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Information
- Triangle Inequality Theorem
- 180 degrees
- Interior & Exterior Angles
- Angles classification: Right, Obtuse, Acute
- Sides classification: Scalene, equilateral, Isosceles
- Angles-Sides theorem
- Supplementary / Complementary Angles
- Triangle Restrictions
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"When 2 Angles Meet" by Chris Burke (Click lower right corner to enlarge)
Weekly Webcomic #95 "Movie Projection" - the math guy pitches his film idea (a love triangle)
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