Question

B) When ABCD is drawn to scale, would

the lines AD and BC be parallel or not?
You must justify your answer without
using a scale drawing.

I want second one ​

Answer 1

Let's check the answer for (a) first.

x + 2x + 3x + 90 = 360

6x = 270

x = 270/6 = 45

That's correct.

(b)

We have A=2x=90°, B=3x=135°, C=x=45°

Since A and D are both 90°, we get parallel segments, AD || BC.

Answer: Yes, AD || BC