Prove that the sum of the measures of the interior angles of a triangle is 180°. be sure to create and name the appropriate geometric figures.

Look at the picture showing triangle ABC

D || BC

so according to parallel lines theorem

angle 1 = angle B

angle 3 = angle C

angle 2 = angle A

1+2+3=180

then:

B+A+C=180

hope you understand it

good luck

Is it b? i’m not too sure cause i haven’t referred back to economics for quite a long time now.

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