Chapter 4:

1. 4-1

1.1. dilation: when all sides get bigger

1.2. Isometry: transfiguration that does not change.

2. 4-2

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

2.1.1. Project specifications

2.1.2. End User requirements

2.1.3. Action points sign-off

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

2.3. scalene triangle: a triangle with no congruent sides

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

2.5. Equalateral Triangle: all angles are equal

2.5.1. Top Priorities

2.5.2. Medium Priorities

2.5.3. Low Priorities

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

2.6.1. Top Priorities

2.6.2. Medium Priorities

2.6.3. Low Priorities

3. 4-7

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

4. 4-3

4.1. auxiliary line: a line drawn to aid proof

4.2. Goals

4.3. Deliverables

5. 4-4

5.1. congruent polygons: polygons that are equal

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

6. 4-5

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

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

7. 4-6

7.1. Included Angle: the common side of two polygons