The two angles form a straight line which is equal to 180 degrees. This makes the angles supplemtary.
To find x, add the two angles together to equal 180:
7x + x+20 = 180
Combine like terms:
8x + 20 = 180
Subtract 20 from both sides:
8x = 160
Divide both sides by 8:
X = 20
PICTURE1: They are both 45
PICTURE2: 810
The answer is 24.25 hope it helps
Answer:
The first answer, 3(pi) km^2
Step-by-step explanation:
3 x pi squared determines the area
