1. Basics
2. Deductive Reasoning
3 - Parallel lines
4 - Congruent Triangles
5 - Quadrilaterals
6 - Inequalities
7 - Similar Polygon
8 - Rt. Triangles
9 - Circles
10 - Constructions
11 - Areas of 2D objects
12 - Areas and Volumes
13 - Coordinates

 

Proving Congruent Triangles

 

Objective:

           • Learning about Ratio and proportion

 

Lesson 7-1 Ratios and Proportion:

            Ratio: The quotient when the first number is divided by the second

          Simplest Form: The lowest that the quotient is reduced down to.

            Proportion: An equation stating that two ratios are equal

a/b = c/d  and a:b = c:d

           Extended Proportions: An equation stating that three or more ratios are equal

a/b = c/d = e/f

           Extremes: The first and last terms of a proportion

           Means: The middle terms of a proportion

Properties of Proportions a/b = c/d is equivalent to: (1) ad = bc (2) a/c = b/c  (3) b/a = d/c  (4) (a+b)/b = (c=d)/d If a/b = c/d =e/f = ....., then (a + c + e...)/ (b + d + f...) = a/b= c/d .......

 

 

 

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