Ellipse volume calculation formula How to calculate the volume (soil) of a semi elliptical pool?

Long radius * short radius * Pai * height of ellipse

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1. If the vertex of parabola y = - x + 8x-12 is p, and the intersection of parabola y = - x + 8x-12 and X axis is C and D, what is the area of triangle PCD
2. Let the intersection of the parabola y = 4-x2 and the straight line y = 3x be A.B. point P moves from a to B on the arc of the parabola. (1) find the coordinates of point P when the area of the triangle PAB is the largest. (2) prove that the figure enclosed by the parabola y = 4-x2 and the straight line y = 3x is divided into two parts of equal area by the straight line x = a
3. Let the parabola y = 4-x & # 178; the intersection point of the parabola y = 3x and the straight line y = 3x be A.B, and the point P moves from a to B on the parabola. (1) find the area of the triangle PAB to be the largest Let y = 4-x & # 178 be A.B. point P moves from a to B on the parabola (1) Find the coordinates of point P when the area of △ PAB is the largest (2) It is proved that the figure enclosed by parabola y = 4-x and line y = 3x is divided into two parts with equal area by line x = a (1) Find the coordinates of point P when the area of △ PAB is the largest. And find out the maximum area 2. Let the straight line y = 2x + B and the parabola y & # 178; = 4x intersect at two points a and B, and the length of the chord AB is 3 √ 5, then calculate the area of △ AOB
4. A mathematical problem about parabola Given that the parabola y = AX2 + BX + C passes through the intersection of the straight line y = 3x-4 and the hyperbola y = 4 / x, and the parabola passes through the origin, the analytic solution of the parabola is obtained We already know that the answer is y = - 3x2 + 7x, which means that X2 is the square of X
5. A math problem (about parabola) Through point a (0, - 1), make a straight line L intersecting parabola y2 = 4x intersecting at two points B and C, and find the trajectory equation of the midpoint P of BC?
6. A quadratic equation How to calculate (3x-2] ^ 2 = 4 (x-3) ^ 2?
7. Quadratic equation There is a rectangular cardboard whose size is 60cm × 80cm, and then a square with equal side length is cut from the four corners of the rectangle The bottom area of the box is 1500cm; Find the side length of the cut square
8. What is the vertex coordinate of parabola y = (x-1) square + 2
9. The vertex coordinates of parabola y = 2 (x-3) square + 1 are
10. What is the area of the triangle formed by the intersection and vertex of the parabola y = - 2x and the straight line y = - 7?
11. How to find the perimeter of an ellipse when its area is known The courtyard of the unit is elliptical. We only know that the area is 19000 square meters. Can we work out the perimeter? That is, the length of the courtyard wall? If the energy is not here to ask, ah, there are no original drawings, many people can not go, depressed, tomorrow the boss will have the result, depressed,
12. Ellipse circumference calculation formula, not too complex, a calculation formula, but also explain!
13. Can anyone tell me the formula for calculating the circumference of an ellipse? Can you explain it more clearly? When the major axis is 50 and the minor axis is 20, what is its circumference? What does each letter mean?,,,
14. A formula for calculating the area of a semi ellipse
15. Calculation formula of arc area!
16. Arc area formula How to calculate the area of Arc? (in the case of chord height, chord length and height)
17. Given the radius and height of the circle, how to find the area formula of the arch? The height and radius of the arch were 45cm and 125cm respectively
18. Volume calculation formula of bow Urgent, online, etc...
19. Physics problems about motion After braking, a stops 36 meters ahead within 3 seconds, B stops after 1.5 seconds, B advances () A.9m B.36m C.18m D.72m
20. A physical problem with the nature of motion Does the velocity of horizontal uniform linear motion and vertical uniform linear motion keep the same Doesn't it mean that the velocity perpendicular to the direction of acceleration doesn't change