It is known that the circumference of an isosceles triangle is 11cm, and the waist length is 1cm longer than the base length?

It is known that the circumference of an isosceles triangle is 11cm, and the waist length is 1cm longer than the base length?

If the waist length is less than x meters, then 3 * X-1 = 11, so x = 4 meters

The angle ABC is an equilateral triangle with a circumference of 24cm and an area
And I just graduated from primary school, I can't understand that

The angle ABC is an equilateral triangle with a circumference of 24cm, so the side length is 8
Area = 8 * (8 * 8-4 * 4) ^ (1 / 2) / 2 = 27.7

The sum of the circumference of two similar triangles is 32 cm
The perimeter sum of two similar triangles is 32cm, and the ratio of their corresponding heights is 3:5?

The perimeter ratio of similar triangles is equal to the corresponding height ratio of similar triangles 3 ∶ 5
32×3／3+5＝12
32×5／3+5＝20

It is necessary to dig a cylindrical reservoir with a perimeter of 6.28 meters at the bottom. How many meters deep does the reservoir need to be dug to store 7.85 cubic meters of water?

The perimeter is 6.28m, and the radius is 6.28 / (2 * 3.14) = 1m from C = 2 π R
Reservoir area = π R ^ 2 = 3.14 * 1 * 1 = 3.14 M2
According to v = sh, the reservoir depth is 7.85 / 3.14 = 2.5m

The perimeter sum of two similar triangles is 32cm, and their corresponding height ratio is 3:5
Then the corresponding perimeter of the two triangles is_____ cm,_____ cm.

12；20

The engineering team dug a cylindrical reservoir with a perimeter of 6.28 meters at the bottom. How many meters deep does the reservoir need to be dug to store 7.85 cubic meters of water?

Flowers and plants in summer,
Bottom radius: 6.28 △ 3.14 △ 2 = 1 (m)
Bottom area: 3.14 × 1 × 1 = 3.14 (M2)
Pool to be excavated: 7.85 △ 3.14 = 2.5 (m)

(2006 · Da Hinggan Mountains) the minimum perimeter of a triangle is ()
A. 14B. 15C. 16D. 17

Let the length of the third side be x, then 7-3 ＜ x ＜ 7 + 3, so 4 ＜ x ＜ 10. Also, X is an integer, so x can take 5, 6, 7, 8, 9. Therefore, the minimum perimeter of the triangle is 15

To dig a cylindrical reservoir with a circumference of 18.84 meters, so that the reservoir can store 70.65 cubic meters, how deep is the pool to dig

The bottom radius is 18.84 △ 3.14 △ 2 = 3M
Bottom area: 3.14 × 3 × 3 = 28.26 square meters
Pool depth: 70.65 △ 28.26 = 2.5m

One side of the triangle is 3cm longer than the second side, and this side is 4cm shorter than the third side. The perimeter of the triangle is 28cm. Find the length of the shortest side

Let the length of the second side be xcm, then the length of the first side is (x + 3) cm and the length of the third side is (x + 7) cm

A cylindrical reservoir, the bottom diameter is 10 meters, the depth of 1 meter, the volume of this reservoir is how many cubic meters

3.14 × (10 / 2) &# 178; × 1 = 78.5m3