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can you show me how to solve these questions?

 May 6, 2018
edited by cerenetie  May 7, 2018
 #1
avatar+51 
+2

Remember your 30-60-90 and 45-45-90 shorctcuts!

 

First One: 3√3

 May 6, 2018
 #2
avatar
+2

Q1:

 

X= 3/tan(30)

 

 

Q2 :

a= 8*sin(60)

b= 8*cos(60)

 

small Triangle area (At) = (a+b)/2

 

Total Area = At*2*6

 

Q3: 

 

X= 4.2/tan(45)

 

Area = 2*8*X+82

 

Q4: 

 

X= 4.2/tan(60)

 

Area = 2*8.4*X+82

 May 6, 2018

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