6. How many edges on a cylinder? 7. \( 2700 \mathrm{~m}=\mathrm{km} \) 8. \( 6 \times 9= \) 9. How many surfaces on a sphere? 0. What number of laps of a 50 -metre pool did you swim if you reached 1000 m ? Write the numeral two thousand nine hundred. Does a semicircle have parallel lines?

Sure, I'd be happy to help answer your questions: **6. How many edges on a cylinder?** A cylinder has **2 edges**. These are the circular rims at the top and bottom of the cylinder. --- **7. \( 2700 \mathrm{~m} = \) km** To convert meters to kilometers, divide by 1,000: \[ 2700 \, \text{m} \div 1000 = 2.7 \, \text{km} \] So, \( 2700 \, \text{m} = 2.7 \, \text{km} \). --- **8. \( 6 \times 9 = \)** \[ 6 \times 9 = 54 \] --- **9. How many surfaces on a sphere?** A sphere has **1 continuous surface**. --- **0. What number of laps of a 50-metre pool did you swim if you reached 1000 m?** To find the number of laps: \[ \text{Number of laps} = \frac{1000 \, \text{m}}{50 \, \text{m per lap}} = 20 \, \text{laps} \] So, you swam **20 laps**. --- **Write the numeral two thousand nine hundred.** Two thousand nine hundred in numerals is **2,900**. --- **Does a semicircle have parallel lines?** No, a semicircle does not have parallel lines. A semicircle is a half of a circle, and its boundary consists of a single curved line (the arc) and a straight line (the diameter). The diameter and the arc do not form parallel lines. --- If you have any more questions, feel free to ask!