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need help with this asap i did it wrong the first time

 Feb 21, 2018
 #1
avatar+99586 
+1

The angle across from the 5cm side  is 30°

In a 30-60-90  triangle like this, the side opposite the 60° will be √3  times as long as the side opposite the 30° angle

 

So  BC  =  height of the triangle  =  5√3

 

So....the area  =  (1/2) base * height  =  (1/2) (5) (5√3)  =

 

(25/2)* √3  cm^2   ⇒   21.7 cm^2

 

 

cool cool cool

 Feb 21, 2018

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