Definition of a 30-60-90 triangle along with the ratio of its sides.
Math Open Reference
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In this Early Edge video lesson, you'll learn more about Triangles: Perimeter and Area, so you can be successful when you take on high-school Math & Geometry.
The Princeton Review
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In this Early Edge video lesson, you'll learn more about Complementary and Supplementary Angles, so you can be successful when you take on high-school Math & Geometry.
The Princeton Review
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Definition and properties of right triangles
Math Open Reference
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Calculate the perimeter and area for each triangle. Answers included.
Math-Drills.com
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This website will help you with squares and their properties. Such as side length, diagonal length, area and perimeter.
WebMath
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This page will allow you to calculate things related to a right triangle. Such as the base, the height, area, perimeter, and Pythagorean Thm.
WebMath
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The worksheets below can be used as part of extra math homework. These geometry worksheets are free and easily printable. They cover typical school work from grade 4 through 8. They include questions on polygons, 3D objects, angles, and calculations of area, volume, etc.
Helping With Math.com
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Definition and picture of a 3:4:5 triangle. Gives other examples of pythagorean triplets.
Math Open Reference
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Definition of a 45-45-90 triangle and the ratio of its sides. Includes a great picture.
Math Open Reference
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