Chapter 4:

1. 4-1

1.1. dilation: when all sides get bigger

1.2. Isometry: transfiguration that does not change.

2. 4-4

2.1. congruent polygons: polygons that are equal

2.2. corresponding sides: sides on a polygon that are the same

3. 4-2

3.1. acute triangle: all angles are less than 90 degrees

3.1.1. Project specifications

3.1.2. End User requirements

3.1.3. Action points sign-off

3.2. obtuse triangle: a triangle with all angles that equal more than 9- degrees

3.3. scalene triangle: a triangle with no congruent sides

3.4. isoscelese: at least two of the sides of the triangle are equal.

3.5. Equalateral Triangle: all angles are equal

3.5.1. Top Priorities

3.5.2. Medium Priorities

3.5.3. Low Priorities

3.6. right angle: a triangle with one angle that equals 90 degree.

3.6.1. Top Priorities

3.6.2. Medium Priorities

3.6.3. Low Priorities

4. 4-5

4.1. triangle ridigity: States that if the side lengths of a triangle are fixed it can only be one shape

4.2. included angle: the angle made by the two adjacent sides of the polygon.

5. 4-3

5.1. auxiliary line: a line drawn to aid proof

5.2. Goals

5.3. Deliverables

6. 4-6

6.1. Included Angle: the common side of two polygons

7. 4-7

7.1. cpctc: corresponding parts of congruent triangles are congruent.