Construction of an equilateral triangle inscribed in a circle.
Step 1) Draw the diameter of the circle through center P using a straight edge.
 Step 2) Open the compass to the width equivalent to the radius of the circle.
<em>Note: As we open the compass equivalent to the radius of the circle. So, we need to draw a circle now. </em>
Therefore, next step would be.
<h3> Step 3) Place the point of the compass on the edge of the circle and mark off arcs all the way around.</h3>
 
        
             
        
        
        
I know a=pi*r^2 anyways, the triangle is:4*8/2=16 The semicircle is: 4pi because 4 is diameter, /2 then square u still get 4. 4*3.14 = 12.56 12.56 + 16 = 28.56.
        
             
        
        
        
Answer:It depends what number are you rounding it to.
Step-by-step explanation:
The tenth place hundreth something...
 
        
             
        
        
        
Answer: okay so the measure of angle 1 is 72 degrees. Angle 2 is 108 degrees. Angle 3 is 72 degrees. And angle 4 is 108 degrees. 
Step-by-step explanation:
I know this because to find angle 1 we are going to subtract 180 degrees from 108 degrees. A straight line like this is 180 degrees. Angle 2 is going to be exactly 108 and angle 3 is also going to be 72 degrees. Angle 4 is 108 degrees because 180-72 is 108
 
        
             
        
        
        
Answer:
-2b - 6
Step-by-step explanation: