Help test today please

d is 52

e is 77

f is 51

.

.

f= 51 degrees

d= 52 degrees

e= 77 degrees

Step-by-step explanation:

All are vertical angles so they have opposite congruent angles

to find f we must solve for the sum of the 3 angles so

52+77+f=180

129+f=180

f=51

i am not sure :

step-by-step explanation:

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.