Answer:
1. 88 degrees.
2. x = 8.
3. x = 3.
4. y = 8.
Explanation:
1.
This is a hexagon where the sum of the internal angles = 720 degrees, so
x = 720 - (172 + 125 + 120 + 95 + 120)
= 720 - 632
= 88 degrees.
2.
If this is a parallelogram then opposite sides are equal , so:
2x = x + 8
x = 8
Checking the other 2 sides:
x = 3x - 16
-2x = -16
x = 8.
3.
This is a rhombus where all sides are equal, so:
x + 5 = 3x - 1
6 = 2x
x = 3.
5x - 7 = 2x + 2
3x = 9
x = 3.
4.
A rectangle where opposite sides are equal, so
2y + 4 = 3y - 4
8 = y
2y = y + 8
y = 8.