# Problems of the area of a triangle

#### Number of problems found: 508

• Rotation
The right triangle with legs 11 cm and 18 cm rotate around the longer leg. Calculate the volume and surface area of the formed cone.
• Right isosceles
Calculate area of the isosceles right triangle which perimeter is 26 cm.
• Pyramid roof
2/4 of the area of ​​the roof-shaped regular tetrahedral pyramid with base edge 10 m and height of 4 m is already covered with roofing. How many square meters still need to be covered?
• Right triangle
Right triangle ABC with side a = 19 and the area S = 95. Calculate the length of the remaining sides.
• Pentagon
Calculate the area of a regular pentagon, which diagonal is u=16.
• R triangle
Calculate the right triangle area whose longer leg is 6 dm shorter than the hypotenuse and 3 dm longer than the shorter leg.
• Triangle
Calculate the area of the right triangle ΔABC if one leg is long 14 and its opposite angle is 59°.
• Rectangle
In a rectangle with sides, 8 and 9 mark the diagonal. What is the probability that a randomly selected point within the rectangle is closer to the diagonal than to any side of the rectangle?
• Circles 2
Calculate the area bounded by the circumscribed and inscribed circle in triangle with sides 12 cm, 14 cm, 18 cm.
• Square
Calculate area of the square with diagonal 64 cm.
• Heron backlaw
Calculate missing side in a triangle with sides 25 and 13 and area 152.
• Sphere cuts
At what distance from the center intersects sphere with radius R = 56 plane, if the cut area and area of the main sphere circle is in ratio 1/2.
• Equilateral triangle
Calculate the side of an equilateral triangle if its area is 892 mm2.
• Right triangle
Right triangle legs has lengths 630 mm and 411 dm. Calculate the area of this triangle.
• Triangle
Calculate heights of the triangle ABC if sides of the triangle are a=82, b=44, and c=53.
• Cap
Jesters hat is shaped by a rotating cone. Calculate how much paper is needed to the cap 54 cm high when the head circumference is 47 cm.
• Right triangle
Legs of the right triangle are in the ratio a:b = 2:8. The hypotenuse has a length of 87 cm. Calculate the perimeter and area of the triangle.
• Isosceles right triangle
Calculate the area of an isosceles right triangle whose perimeter is 252 cm.
• Widescreen monitor
Computer businesses hit by a wave of widescreen monitors and televisions. Calculate the area of ​​the LCD monitor with a diagonal size 20 inches at ratio 4:3 and then 16:9 aspect ratio. Is buying widescreen monitors with the same diagonal more advantageou
• Glass mosaic
How many dm2 glass is nessesary to produc 97 slides of a regular 6-gon, whose side has length 21 cm? Assume that cutting glass waste is 10%.

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See also our trigonometric triangle calculator. Area - math word problems. Triangle Problems.