can anyone help me with these question

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

 

First One: 3√3

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