Pythagororean Theorem
Subject:
a^2+b^2=c^2
This can only be used for right triangles. Sides a and b are the legs of the triangle. Side c is the hypotenuse.
Geometry
Forum reference:
Book page:
http://course-notes.org/Geometry
How to set up proofs
Subject:
1. draw a t-table
2. statements on the right, reasons on the left
The Pythagorean Theorem
Subject:
Tags:
a^2+b^2=c^2
This theorem can only be used with right triangles. A and B are the leags and C is the hypotenuse.
geometry
Pythagorean Theorem
Subject:
a^2 + b^2 = c^2
chapter 1 powerpoint essentials of geometry
Subject:
Tags:
Text automatically extracted from attachment below. Please download attachment to view properly formatted document.
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5.1 Special Segments in Triangles
Subject:
Text automatically extracted from attachment below. Please download attachment to view properly formatted document.
---Extracted text from past/51_special_segments_in_triangles.pdf---
30-60-90 degree triangles
Subject:
30-60-90 Right Triangle A 30-60-90 right triangle (literally pronounced "thirty sixty ninety") is a special type of right triangle where the three angles measure 30 degrees, 60 degrees, and 90 degrees. The triangle is significant because the sides exist in an easy-to-remember ratio: 1:1sqrt(3):2. That is to say, the hypotenuse is twice as long as the shorter leg, and the longer leg is the square root of 3 times the shorter leg. You might also remember it as "X, 2X, and X roots of 3", which is how I remember it, but then you have to remember that 2X is actually the longest side, not X roots of 3.
Proofs
Subject:
I have no idea what these are.
geometry formulas
Subject:
Rectangle:
rectangle-image
Perimeter = l + l + w + w = 2 × l + 2 × w
Area = l × w
Square:
square-image
Perimeter = s + s + s + s = 4 × s
Area = s2
Parallelogram:
parallelogram-image
Perimeter = a + a + b + b = 2 × a + 2 × b
Area = b × h
Rhombus:
Rhombus-image
Perimeter = b + b + b + b = 4 × b
Area = b × h
Triangle:
Triangle-image
Perimeter = a + b + c
Area = (b × h)/2
Trapezoid:
Trapezoid-image
Perimeter = a + b + c + d
Trapezoid-formula-image
Circle:
Circle-image
Perimeter = 2 × pi × r or Perimeter = pi × d
Area = pi × r2 or Area = (pi × d2)/4
Pages
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