Diagonal - 9th grade (14y) - math problems

Number of problems found: 235

  • Rhombus diagonal
    rhombus2 Area of rhombus is 224. One diagonal measures 33, find length of other diagonal.
  • Body diagonal
    cube_diagonals Calculate the cube volume, whose body diagonal size is 75 dm. Draw a picture and highlight the body diagonal.
  • Cube diagonal
    cube_diagonal Determine the length of the cube diagonal with edge 37 mm.
  • Body diagonal
    diagonal Calculate the length of the body diagonal of the 6cm cube.
  • Diagonal
    rectangles2 The diagonal of the rectangle has a length of 41.4 cm. The angle between the diagonal and longer side of the rectangle is 26°. Calculate the area of the rectangle.
  • Square diagonal
    square_diagonal Calculate the length of diagonal of the square with side a = 11 cm.
  • Diagonal to area
    rectangle Calculate the area of a rectangle in which the length of the diagonal is 10 cm.
  • Trapezoid - diagonal
    licho A trapezoid has a length of diagonal AC crossed with diagonal BD in the ratio 2:1. The triangle created by points A, cross point of diagonals S and point D has area 164 cm2. What is the area of the trapezoid?
  • Square diagonal
    square_d Calculate the length of the square diagonal if the perimeter is 172 cm.
  • Body diagonal
    cubes3 Find the cube surface if its body diagonal has a size of 6 cm.
  • Diagonal
    rectangle_diagonal Calculate the diagonal length of the rectangle ABCD with sides a = 8 cm, b = 7 cm.
  • Body diagonal
    kvadr Cuboid with base 7cm x 3,9cm and body diagonal 9cm long. Find the height of the cuboid and the length of the diagonal of the base,
  • TV diagonal
    tv_diagonal Diagonal TV is 0.56 m long, how big the television sreen is if the aspect ratio is 16:9?
  • Find diagonal
    diagonal Find the length of the diagonal of a cuboid with length=20m width=25m height=150m
  • Rhombus
    rhombus Calculate the length of the diagonal AC of the rhombus ABCD, if its perimeter is 84 dm and the other diagonal BD has length 20 dm.
  • Space diagonal angles
    kvadr_diagonal Calculate the angle between the body diagonal and the side edge c of the block with dimensions: a = 28cm, b = 45cm and c = 73cm. Then, find the angle between the body diagonal and the plane of the base ABCD.
  • Wall diagonal
    cube Calculate the length of wall diagonal of the cube whose surface is 384 cm square.
  • Body diagonal
    krychle Calculate the volume and surface of the cube if the body diagonal measures 10 dm.
  • Volume and body diagonal
    kvader11 Calculate how much the volume and body diagonal of the cuboid decrease if we reduce each of its three edges a, b, c by 18%?
  • Construct
    kosodlznik3 Construct a rhombus ABCD, if the size of the diagonal AC is 6 cm and diagonal BD 8 cm long.

Do you have an interesting mathematical word problem that you can't solve it? Submit a math problem, and we can try to solve it.



We will send a solution to your e-mail address. Solved examples are also published here. Please enter the e-mail correctly and check whether you don't have a full mailbox.

Please do not submit problems from current active competitions such as Mathematical Olympiad, correspondence seminars etc...



Diagonal - math problems. Examples for 9th grade.