11.2
step-by-step explanation:
when doing tangent the tangent of the angle is equal to the opposite side from the angle over the adjacent side to the angle.
tan43 = x / 12
move 12 over by multiplying each side by 12
12tan43 = x
x = about 11.2
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.
∡ eia and ∡ kij are congruent
1.) 21
2.) 0.453
3.) 1.5
4.) 48
5.) $ 22