Answer:
Perimeter = 14
Area = 
Step-by-step explanation:
When an equation is in standard form, x isn't negative so she should divide everything by a negative 1 to change it into a positive equation.
Answer:
20 degrees
Step-by-step explanation:
every triangle had 3 angles that all add up to 180
the problem gives you two angles which are 120+40 which is 160
180-160 is 20 degrees which is whi it is the answer
Answer: 71.6°
tan-1(9/3) = 71.56505118°