Quadrilateral ABCD is a parallelogram. DE = 6.1 cm and m∠DAB = 120°.

Parallelogram A B C D is shown. Diagonals are drawn from point A to point C and from point D to point B and intersect at point E. The length of A D is 10 centimeters and the length of D C is 5 centimeters.

What is BC?

cm

What is m∠BCD?

°

What is AB?

cm

What is EB?

cm

the final price would be 29.6925

step-by-step explanation:

39.59 minus 25% equals 29.6925

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.

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.