A lace is sewed around a round tablecloth with a diameter of 1.2 meters. The joint is 6 cm long, and the lace is long______ Rice

A lace is sewed around a round tablecloth with a diameter of 1.2 meters. The joint is 6 cm long, and the lace is long______ Rice

According to the meaning of the title, C = π D, = 3.14 × 1.2, = 3.768 (m); 6cm = 0.06m; 3.768 + 0.06 = 3.828 (m); so the answer is: 3.828

Qin Fen's family has a round table. She measures the diameter of the table top to be 0.9 meters. Her mother wants to make a tablecloth and sew a circle of lace. What's the area of the round table cloth at least

The area formula of a circle is s = π times R & sup2, and the radius is 0.45M by diameter / 2
The approximate value of 0.45 & sup2; times π is 3.14 = 0.63585 square meters

There is a round table in Fen's family. The diameter of the table he measured is 0.9m. My mother wants to make a tablecloth and sew a circle of lace. How many square meters is the area of the tablecloth at least
How many M is the length of lace at least

Lace length at least: TABLECLOTH perimeter = tabletop perimeter = 0.9 * 3.14 = 2.826 ≈ 2.83 (m)
9 / 2 = 0.45M,
The area of tablecloth is at least: 0.45 * 0.45 * 3.14 = 0.63585 ≈ 0.64 (M2)