Answer:
(27)
Rectangle
Interior angles are all 90°
- 5x - 3° = 90°
- 5x = 93°
- x = 93°/5
- x = 18.6°
(28)
Rhombus
All sides are congruent
- 14 - x = 2x + 5
- 2x + x = 14 - 5
- 3x = 9
- x = 3
(29)
Square
Diagonals are perpendicular
- 13x + 5.5° = 90°
- 13x = 84.5°
- x = 84.5°/13
- x = 6.5°