Okay. So 90 yds was cut from the 230 yd yarn. 230 - 90 = 140. 1/2 of 140 is 70. 230 - 70 = 160. The yellow yarn was 160 yds longer than the blue yarn at first.
Four, Coastal Plains, North Central, Great, and Mountain plains
A golden rectangle is a rectangle whose length and width follow the golden ratio (about 1:1.618).
Given the length, you would divide by 1.618 to find the width.
Edit: The exact value is

, but 1.618 should suffice.
Answer:
Angle A = 180
Step-by-step explanation:
180=7x+40
Subtract 40 from both sides
140 = 7x
Divide 7 from both sides
20=x
Substitue 20 in for x
7(20)+40
140+40 = 180