Whoever is very good at math can you cause i'm confused

Given
< C= <B/3
< B= < 3Ceqn(i)

Since consecutive angles of parallelogram are supplementary :
<C +<B=180
<C+ < 3C =180
< C=180/4
< C=45°

So in eqn(i),

<B=3×45=135°

Since <A &<C are opposite angles of a parallelogram,they are equal.

<C =<A=45°↪Ans 1

Similarly for <B &<D,

<B=<D=135°↪Ans 2

i = 2 / - 5

step-by-step explanation:

evaluation of ( 2 - 4 ) ( p + q ) when p = 2 and q = 5 i, by putting values of p and q,                                                                    

0 = ( 2 - 4 ) ( p + q )0 = ( 2 - 4 ) ( 2 + 5 i ),   by multiplying these0 = ( 4 + 10 i - 8 - 20 i )0 = 4 - 8 + 10 i - 20 i0 = - 4 -10 i   0 = 2 ( - 2 - 5 i )0 / 2 = - 2 - 5 i- 2 - 5 i = 0- 5 i = 2i = 2 / - 5

No i refuse to tell you the answer but the estimate is 10