You have to use distributive property then you combine like terms 
 
        
             
        
        
        
Answer:
The measure of the fourth angle = 137.1°
Step-by-step explanation:
Let x = the measure of the fourth angle
Sum of all 4 interior angles in a quadrilateral equal 360°
so
x + 23.5° + 99° + 100.4° = 360°
x + 222.9° = 360°
               x = 360° - 222.9°
               x = 137.1°
 
        
             
        
        
        
945 rounded to the nearest ten is 950
        
                    
             
        
        
        
A.  is the secant line on the below circle.
 is the secant line on the below circle.
<u>Step-by-step explanation:</u>
The intersection of the circle will result in either Tangent or Secant. Secant is a line intersecting a circle at two different point. This concept explains the relation between the circle and line intersecting it.
From the given diagram,
The  and
 and  intersects the circle at the point H and I.
 intersects the circle at the point H and I.
∴ It can also represented that the  and
 and  intersects at a point G.
 intersects at a point G.
From the given options  is the secant line that intersects the circle twice.
 is the secant line that intersects the circle twice. 
 
        
             
        
        
        
Answer:
The square root of pi is 1.7724