Angles, Sides & similarity ratio
math warehouse
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This site shows the definition of similar polygons with the relationship of corresponding angles and how corresponsing sides are in proportion.
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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In this Early Edge video lesson, you'll learn more about Types of Angles, 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 Equilateral, Isoceles and Scalene Triangles, 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 Triangles, so you can be successful when you take on high-school Math & Geometry.
The Princeton Review
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Similar triangles - sides, medians, perimeters, altitudes all in same proportion.
Math Open Reference
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Similar triangles - ratio of areas is the square of the ratio of the sides.
Math Open Reference
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Very basic intro to similar triangles including a definition of similar triangles
GCSE - General Certificate of Secondary Education
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