Planimetrics - math problems

Study plane measurements, including angles, distances, and areas. In other words - measurement and calculation of shapes in the plane. Perimeter and area of plane shapes.

Number of problems found: 2090

  • One hectare
    land_1 How many square meters are one hectare?
  • N-gon
    ngon How many diagonals has convex 11-gon?
  • Diagonal
    diamond Can be a diagonal of diamond twice longer than it side?
  • Semicircle
    semicircles_rect Calculate the length of a semicircle with a radius of 6cm.
  • Diagonals
    diagonals_1 What x-gon has 54 diagonals?
  • Add vector
    vectors_2 Given that P = (5, 8) and Q = (6, 9), find the component form and magnitude of vector PQ.
  • Triangle
    eq_triangle Can an equilateral triangle have a right angle?
  • Q-Exam
    unitCircle If tg α = 9.6, Calculating sin α, cos α, cotg α .
  • 9-gon
    9gon Sum of interiol angles of 9-gon is:
  • 4-gon
    trapezoid It is true that a 4-gon whose two sides are parallel and the other two has equal length, is a parallelogram?
  • Euclid2
    euclid In right triangle ABC with right angle at C is given side a=29 and height v=17. Calculate the perimeter of the triangle.
  • Clock
    clock How long is trajectory of second hand of hours for day, if is 15 mm long?
  • Diagonal
    rhombus Can a rhombus have the same length diagonal and side?
  • Center traverse
    trianles Does the middle traverse indeed bisect the triangle?
  • Adding shapes
    rectangle_13 5 triangles + 1 square = how many sides in all
  • Diamond
    koso_4 The diamond has a circumference of 48cm. Calculate the length of its side in dm.
  • Percitipation - meteo
    percipitation Do you have any tip for calc percitipation on a lnd ? Example on 2 ha falls to 5 mm, how many cubic meters is it?
  • Complementary angles 2
    complementary_angles Two complementary angles are (x+4) and (2x - 7) find the value of x
  • Shade
    box3 Shade the area on the grid that shows 5/8 x 2/4
  • Height
    thales_law Is it true that the height is less or equal to half of the hypotenuse in any right triangle?

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...



See also more information on Wikipedia.