Given a (2,3,1) B (4,1,2) C (6,3,7) d (- 5, - 4,8), find the distance from D to plane ABC

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• 1. Let a (2,3,1) B (4,1,2) C (6,3,7) d (- 5, - 4,8) find the distance from D to plane ABC, Let a (2,3,1) B (4,1,2) C (6,3,7) d (- 5, - 4,8) find the distance from D to plane ABC?
• 2. Let p be a point outside the plane where △ ABC lies, the distance between P and a, B, C is equal, and ∠ BAC is a right angle
• 3. Track: the number of points on the plane of triangle ABC, which is equal to the distance between the three sides of the straight line, is____ One
• 4. In the plane of the triangle ABC, how many points are equidistant from the three sides of the triangle ABC?
• 5. ABC is an equilateral triangle with side length 4. If the distance between a, B, C and plane a is the root sign 3, how many are there?
• 6. It is known that the distance from the cross section of three points a, B and C on the sphere to the center O is equal to half of the radius, and ab = BC = CA = 3cm I want the most clear and easy to understand answer process
• 7. It is known that the distance from the cross section of three points a, B and C on the sphere to the center of the sphere is equal to half of the radius of the sphere, and AC = BC = 6, ab = 4. The surface area and volume of the sphere are calculated
• 8. It is known that the distance between the cross sections of three points a, B, C and the center O of the sphere is equal to half of the radius of the sphere, and ab = BC = CA = 3
• 9. If it is known that the cross sections of three points a, B and C on the sphere and the distance between the center of the sphere are equal to half of the radius of the sphere, and ab = BC = CA = 2, then the area of the sphere is?
• 10. There are three points a, B and C on the sphere. It is known that ab = 3, AC = 4 and BC = 5. If the distance from the center of the sphere to the plane ABC is 6, the surface area of the sphere is 0
• 11. Let a (2,3,1), B (4,1,2), C (6,3,7), D (- 5, - 4,8), then the distance from D to plane ABC is?
• 12. In space, it is shared with the plane whose distance from the three vertices of △ ABC is 1cm______ ．
• 13. There are several planes which are 1cm away from the three vertices of △ ABC whose sides are 3cm As the title 2. How many out of plane lines are there in the 12 diagonals of the cuboid? 3. Let f (x) = 1 + X / 1-x, and let F 1 (x) = f (x), f K + 1 (x) = f (f K (x)), k = 1,2.. then f 2007 (x) =?
• 14. It is known that there are three points a and B. C on the sphere, which form an equilateral triangle with side length of 1. If the distance from the center of the sphere to the plane ABC is equal to 13 of the radius of the sphere, then the radius of the sphere is () A. 3B. 13C. 64D. 32
• 15. It is known that △ ABC is not in plane α. If the distances from a, B and C to plane α are equal, then the positional relationship between plane ABC and plane α is______ ．
• 16. The distance from three points ABC not on the same straight line to plane a is equal, and a does not belong to a 1. At least one edge of triangle ABC is parallel to a 2. At most two sides of triangle ABC are parallel to a 3. Only one edge of triangle ABC intersects with a What are the correct ones?
• 17. ABC three points are in the same plane but not on the same straight line. You can draw three straight lines through these three points, right?
• 18. How many points in the plane are equidistant from three points a B C that are not on the same line
• 19. In s-abc, triangle △ ABC is an equilateral triangle with side length 4, plane sac ⊥ plane ABC, SA = SC = 2, M is the midpoint of ab (1) Find the size of dihedral angle s-cm-a; (2) find the distance from point B to surface SCM
• 20. It is known that adae is the middle line and height of triangle ABC respectively. The perimeter of triangle ABC is 3 cm larger than that of triangle ACD, and ab = 3 cm Ask for the length of AC, Calculate the area relationship between △ abd and △ ACD