Draw the largest circle on a rectangular paper 12 cm long and 8 cm wide. The radius of the circle is () cm and the area of the circle is () square cm

Draw the largest circle on a rectangular paper 12 cm long and 8 cm wide. The radius of the circle is () cm and the area of the circle is () square cm

Draw the largest circle on a rectangular paper 12 cm long and 8 cm wide. The radius of the circle is (4) cm and the area of the circle is (50.24) square cm

Draw the largest semicircle in a rectangular paper with a length of 8 cm and an area of 40 square cm. The area of the semicircle is ［ square cm?

Width: 40 △ 8 = 5cm. Radius: 5cm. Semicircle area: 3.14x5x5 △ 2 = 39.25cm2

Draw the largest circle in a rectangle 12 cm long and 8 cm wide. The area of the circle is______ Square centimeter

2, = 3.14 × 16, = 50.24 (square centimeter); answer: the area of this circle is 50.24 square centimeter

A table top is a round dining table. The perimeter of the square tablecloth on it is 3.2 meters. The tablecloth hanging down is at least 20 cm. How many meters is the perimeter of this round table?

3.2 △ 4 = 0.8m
20 cm = 0.2 M
0.8-0.2x2 = 0.4m
Round table perimeter 0.4x3.14 = 1.256 M

Xiaofang bought a square tablecloth for the round dining table at home. The diameter of the round tablecloth is 1.4 meters and the height is 1.6 meters. If the four corners of the square tablecloth just touch the ground, how long is the diagonal of the square tablecloth?

1.4 + 1.6 × 2 = 1.4 + 3.2 = 4.6 (m) a: the diagonal length of the square tablecloth is 4.6 meters

Naughty home's desktop is round, mother to table with a square tablecloth, the amount of desktop diameter is 1.5 meters, 2 meters, to make the four corners of the square tablecloth just contact the ground, how many meters is the diagonal of the square tablecloth?

Let the diagonal of a square tablecloth be X
Using Pythagorean theorem
x=√（2(1.5+1.2*2)）
x=√7.8
x≈2.793 m
1.5+1.2*2=3.9
3.9*2=7.8
√7.8≈2.793m
√（2(1.5+1.2*2)）
≈2.793m

The table top of xiangmanlou is round. You should match a square tablecloth to the table. The diameter of the table top is 1.5 meters and the height of the table is 1.2 meters. If it is a tablecloth
The four corners of the square tablecloth just touch the ground. What is the diagonal of the square tablecloth?

3.9