16.3 Find a Pattern p.360-361

I. Regular polygon: polygon in which all sides are congruent and all angles are congruent
II. Diagonal of a polygon: a line segment that joings two nonadjacent vertices of the polygon
III. The measure of each angle in a regular polygon with n sides is found using this following equation:

16.2 Triangles - ACTIVITY

• Use a straight edge to draw an example of each of the following
a. Triangles classified by their ANGLES
i. Right angle
ii. Acute angle
iii. Obtuse angle
b. Triangles classified by their SIDES
i. Scalene triangle
ii. Isosceles triangle
iii. Equilateral triangle
• Label the length or angle measures and write a written explanation for each triangle to show why it is different from the others and classified like it is. Use the example as a guide.

16.2 Triangles (p.356-357)

I. ALL TRIANGLES HAVE INTERIOR ANGLES THAT ADD UP TO 180 degrees
II. Naming Triangles by their ANGLES
A. A. Acute triangle: a triangle with all angles less than 90 degrees
B. B. Obtuse triangle: a triangle with one angle greater than 90 degrees
C. C. Right triangle: a triangle with one right angle

III. Naming Triangles by their sides
A. Equilateral triangle: a triangle with three congruent sides
B. Isosceles triangle: a triangle with exactly two congruent sides
C. Scalene triangle: a triangle with no congruent sides

Check out this helpful link from math.com for pictures and more explanation about each of these types of triangles