Area of shape + Heron's formula - math problems

Number of problems found: 34

  • Gardens
    garden The area of the square garden is 3/4 of the area of the triangular garden with sides of 80 m, 50 m, 50 m. How many meters of the fence do we need to fence a square garden?
  • Compute 4
    14-12-12 Compute the exact value of the triangle area with sides 14 mi, 12 mi, and 12 mi long.
  • Circular railway
    described_circle2 The railway connects in a circular arc the points A, B, and C, whose distances are | AB | = 30 km, AC = 95 km, BC | = 70 km. How long will the track from A to C?
  • Sss triangle
    8_11 Calculate the area and heights in the triangle ABC by sides a = 8cm, b = 11cm, c = 12cm
  • Is right triangle or not
    triangle_rt1 If right triangle ABC, have sides a=13, b=11.5, c=22.5. Find area.
  • Triangular prism
    688_triangle Calculate the surface of a triangular prism 10 cm high, the base of which is a triangle with sides 6 cm 8 cm, and 8 cm
  • Four sides of trapezoid
    lichobeznik2 Trapezoid is given by length of four sides: 40.5 42.5 52.8 35.0. Calculate its area.
  • Sides of the triangle
    herons Calculate triangle sides where its area is S = 84 cm2 and a = x, b = x + 1, xc = x + 2
  • The farmer
    field The farmer would like to first seed his small field. The required amount depends on the seed area. Field has a triangular shape. The farmer had fenced field, so he knows the lengths of the sides: 119, 111 and 90 meters. Find a suitable way to determine th
  • Cardboard box
    krabicka We want to make a cardboard box shaped quadrangular prism with rhombic base. Rhombus has a side of 5 cm and 8 cm one diagonal long. The height of the box to be 12 cm. The box will be open at the top. How many square centimeters cardboard we need, if we ca
  • Trapezoid - hard example
    trapezium Base of the trapezoid are: 24, 16 cm. Diagonal 22, 26 cm. Calculate its area and perimeter.
  • Sails
    ship_nina We known heights 220, 165, and 132 of sail. It has a triangular shape. What is the surface of the sail?
  • Park
    park_voda In the newly built park will be permanently placed a rotating sprayer irrigation of lawns. Determine the largest radius of the circle which can irrigate by sprayer P so not to spray park visitors on line AB. Distance AB = 55 m, AP = 36 m and BP = 28 m.
  • Triangle
    triangle_ABC The triangle has known all three sides: a=5.5 m, b=5.3 m, c= 7.8 m. Calculate area of ​this triangle.
  • Box
    Rhombic_prism Cardboard box-shaped quadrangular prism with a rhombic base. Rhombus has a side 5 cm, and one diagonal 8 cm long, and the box's height is 12 cm. The box will open at the top. How many cm2 of cardboard do we need to cover overlap and joints that are 5% of
  • Diamond
    diamond Rhombus has side 17 cm and and one of diagonal 22 cm long. Calculate its area.
  • Prism
    prism_rhombus Calculate the volume of the rhombic prism. The prism base is a rhombus whose one diagonal is 47 cm, and the edge of the base is 28 cm. The edge length of the base of the prism and height is 3:5.
  • Triangle
    sedlo Plane coordinates of vertices: K[11, -10] L[10, 12] M[1, 3] give Triangle KLM. Calculate its area and its interior angles.
  • Triangle ABC
    triangles Calculate the sides of triangle ABC with area 1404 cm2 and if a: b: c = 12:7:18
  • Described
    desc_circle Calculate perimeter of the circle described by a triangle with sides 478, 255, 352.

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See also our trigonometric triangle calculator. Examples of area of plane shapes. Heron's formula - math problems.