Anyone know the answer to these questions ?

see explanation

Step-by-step explanation:

Using the tangent ratio in the right triangle and tan45° = 1

tan45° = = = 1 ( multiply both sides by 7 )

x = 7

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(8)

Using the cosine ratio and cos45° =

cos45° = = = ( cross- multiply )

y = 7

dc=6 square root of 3 and ac is 12 square root 3

c and d

step-by-step explanation:

square root of 3/2 = 18/c

cross multiply to get 18*2=√3*c

36/√3 * √3/√3 = c

c= 36*√3/3

c=12√3