If the median line of a waist of an isosceles triangle divides its circumference into two parts, 33cm and 24cm, then its waist length is______ ．

If the median line of a waist of an isosceles triangle divides its circumference into two parts, 33cm and 24cm, then its waist length is______ ．

As shown in the figure: let ad = xcm, ∵ ad be the middle line of △ ABC, ∵ ad = CD = xcm, ab = AC = 2xcm, ① if AB + ad = 33cm, then 2x + x = 33, the solution is: x = 11, ∵ ad = CD = 11cm, AB = AC = 22cm, ∵ BC + CD = 24cm, ∵ BC = 13cm, ∵ 22cm, 22cm, 13cm can form a triangle, ∵ its waist length is 22cm; ② if AB + ad = 24cm, then 2x + x = 24, the solution is: x = 8, ∵ ad = CD = 8cm, ab = AC = 16cm, ∵ BC + CD = 33cm, ∵ BC = 25cm Its waist length is 16cm. To sum up, its waist length is 22cm or 16cm. So the answer is 22cm or 16cm

A cylindrical grain bin, measured from the inside, its bottom circumference is 3.14 meters, 2 meters. How many cubic meters of rice can this grain bin hold?
If each cubic meter of rice weighs about 500 kg, how many kg of rice can be stored in this grain bin?

The perimeter of the bottom of the column is 3.14 meters
The radius of the cylinder is 3.14 / 2 * π = 0.5m
So the volume of cylinder is π * r & # 178; * H = π * 0.5 & # 178; * 1.2 = 0.942m3
Each cubic meter of rice weighs about 500 kg. This grain bin can hold 0.942 * 500 = 471 kg of rice

If the median line on the waist of an isosceles triangle is known and its circumference is divided into two parts of 20cm and 24cm, then the base length of the isosceles triangle is cm
It is known that the median line on the waist of an isosceles triangle divides its circumference into two parts, 20cm and 24cm. Then what is the length of the bottom edge of the isosceles triangle?

According to the meaning of the question, there are two cases, which may be that half of the waist length plus the bottom is equal to 24, or half of the waist length plus the bottom is equal to 20. If the bottom length is x and the waist length is y, then there are equations according to the meaning of the question: (1) x + Y / 2 = 24 and y + Y / 2 = 20 or (2) x + Y / 2 = 20 and y + Y / 2 = 24

A cylindrical grain bin, measured from the inside, has a perimeter of 9.42 meters at the bottom and a height of 2 meters. Each cubic meter of rice weighs about 545 kg. How many kg of rice does the bin hold

Bottom radius = 9.42 △ 3.14 △ 2 = 1.5m
Weight: 3.14 × 1.5 × 178; weight: 2 × 545 = 7700.85kg

An isosceles triangle is an isosceles triangle whose circumference is divided into two parts: 24cm and 42cm by the middle line of one waist, then its base length is cm?

Suppose the waist length is 2a and the bottom edge is X
a+2a=42
a+X=24
X =10
or
a+2a=24
a+X=42
X = 34 --- rounding off (waist length is 16, 16 + 16 < 34)

The circumference of the bottom surface of a cylindrical grain bin is 62.8 meters, and the height is 3 meters. If the weight of rice per cubic meter is 545 kg, how many tons of rice can this grain bin hold?

Bottom radius = 62.8 / (2 π) = 10
Volume = 10 * 10 * π * 3 = 300 π = 942
Rice weight = 942 * 545 = 513390 thousand yuan = 513.39 tons

If the length of three sides of a triangle is three continuous even numbers, the minimum perimeter of the triangle is ()

The length of the three sides of a triangle is three consecutive even numbers
The three smallest continuous even numbers are: 2,4,6, which obviously cannot form a triangle;
Secondly, the small continuous even number is: 4,6,8, which can form a triangle, so the minimum perimeter is: 4 + 6 + 8 = 18

A grain bin full of rice is 0.9m high, with a cone on the top and a cylinder on the bottom. The circumference of the bottom is 12.56m, and the height of the cylinder is 0.5m
How much rice can be stored in this grain store;

Bottom radius: 12.56 △ 3.14 △ 2 = 2m
The height of the upper cone is: 0.9-0.5 = 0.4m
Grain storage volume: 3.14 × 2 × 2 × 0.5 + 3.14 × 2 × 2 × 0.4 × 1 / 3 ≈ 6.28 + 1.67 = 7.95 (M3)

Given that the two sides of a triangle are 2 and 11, and the circumference is even, find the length of the third side

11-2