1. The difference of two supplementary angles is 70° which is the larger angle?
A/ 135°
B/145
C/55
D/125° ✓
- Let the numbers be x and x-70
- we know that,
- sum of two supplimentary angles = 180°
- x+x-70=180°
- 2x-70=180°
- 2x=180°+70°
- 2x=250°
- x=125°
- and x-70°= 125°-70° = 55°
- hence,the larger angle is 125°