Answer: 17
Step by step : 146+2x=180
2x=34
X=17
2.17720 × 10^2 is the answer
Answer:

Step-by-step explanation:
x =135(being opposite angles of a parallelogram)
Area of circle = πr²
Area of circle = π x 12 x 12
Area of circle = 452.4cm² (nearest tenth)