Answer:
See below ~
Step-by-step explanation:
We know the sum of the interior angles is 720° for a hexagon.
Finding x
- 2(90)° + 2(5x + 10)° + 136° + 134° = 720°
- 180° + 10x° + 20° + 270° = 720°
- 10x° + 470° = 720°
- 10x° = 250°
- x = 25
Finding m∠ABC
- ∠ABC = 5x + 10
- ∠ABC = 5(25) + 10
- ∠ABC = 125 + 10
- ∠ABC = 135°
