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Not sure how to do this

 Mar 4, 2018
 #1
avatar+99592 
+2

We have a 30-60-90  right triangle

 

The side across from the 30° angle  = 5   cm  =  the base of the triangle

 

The side across from the 60° angle  is   √3   times this  =  5 √3  cm = height of the triangle

 

So.....the area is    (base) (height)  / 2  =

 

(5) * (5 √3)  /  2  =

 

(25/2) √3    cm^2    .....  this is exact  !!!

 

 

cool cool cool

 Mar 4, 2018

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