3 - Angles and Polygons

Question 1

How do you work out exterior angles?

Answer 1

360 / n

Question 2

How do you work out interior angles?

Answer 2

180 - ext
or
((n - 2) x 180) / n

Question 3

What are the the four rules for congruency?

Answer 3

SSS S - Side
SAS A - Angle
ASA R - Right angle
RHS H - Hypotenuse

Question 4

What is the difference between similar and congruency?

Answer 4

Similar -> Same angles different size (Proportionately same)

Congruent -> Same angles and size (Identical)

Question 5

What are the four rules for angles on parallel lines?

Answer 5

Alternate (Z - shaped) Equal angles
Corresponding (F - shaped) Equal angles
Opposite (X - shaped) Equal angles
Co - interior (C - shaped) Angles add to 180