It is a right angle,90° is a right angle also, triangle.
        
             
        
        
        
Answer:
A definition and a theorem can be used as a reason in a two-column proof. A two column proof is assembled into statement and reason columns, where each statement should have verified reason.
Step-by-step explanation:
 
        
             
        
        
        
Answer: 22 1/2
Step-by-step explanation: first convert 4 1/2 into a mixed # = 9/2 
The divide that by 5 (mult by reciprocal) 
Reciprocal is the # flipped so, 
9/2 x 1/5 
= 45/2
divide 45 by 2 
 
        
             
        
        
        
Answer:
(1.5,-2.6)
Step-by-step explanation:
Given the polar coordinates (-3,60°).
Let our Cartesian coordinates be (x,y)
#We know that when converting the rectangular coordinates (x,y) to polar (r,θ), then:

#Using the illustration above, we can express our polar coordinates as:

#Solve simultaneously to solve for x and y:

Hence, the Cartesian coordinates are (1.5,-2.6)