Answer:
Step-by-step explanation:
Based on the given conditions, write:
Find common denominator and write numerators above common denominator:
Calculate the sum or difference:
Divide the fraction by multiplying its reciprocal:
Calculate the product or quotient:
Answer:
Answer:
°
Step-by-step explanation:
An alternative method is to use the exterior angle.
the sum of the exterior angles is ALWAYS 360 °
So you can find the size of the exterior angles of a regular polygon quite easily:
If there are 18 sides ( n = 18 ) , then each exterior angle is:
°
The sum of the exterior and interior angles is 180° because they are adjacent angles on a straight line.
∴ each interior angle is 180° - 20° = 160°
