# Triangle calculator

Please enter what you know about the triangle:

The calculator solves the triangle specified by three of its properties. Each triangle has six main characteristics: three sides a, b, c, and three angles (α, β, γ). The classic trigonometry problem is to specify three of these six characteristics and find the other three. Of course, our calculator solves triangles from combinations of main and derived properties such as area, perimeter, heights, medians, etc.
Usually by the length of three sides (SSS), side-angle-side, or angle-side-angle.

## How does this calculator solve a triangle?

The calculation of the general triangle has two phases:**The expert phase**is different for different tasks. The calculator tries to calculate the sizes of three sides of the triangle from the entered data. He gradually applies the knowledge base to the entered data, which is represented in particular by the relationships between individual triangle parameters. These are successively applied and combined, and the triangle parameters are calculated. Calculator iterates until the triangle has calculated all three sides.

For example, the appropriate height is calculated from the given area of the triangle and the corresponding side. From the known height and angle, the adjacent side, etc., can be calculated. The calculator uses use knowledge, e.g., formulas and relations like the Pythagorean theorem, Sine theorem, Cosine theorem, and Heron's formula.-
**The second stage**is the calculation of the properties of the triangle from the available lengths of its three sides.

## Examples of how to enter a triangle:

a=3 b=4 c=5 ... triangle calc by three sides a,b,c.

B=45 c=10 a=9 ... triangle calc by two sides a,c and included angle B.

A=25 C=80 b=22

A=35 C=26 a=10

a=3 C=90 c=5 ... how to enter right-angled triangle.

a=3 β=25 γ=45 ... triangle calc if we know the side and two angles.

a=3 β=25 T=12 ... triangle calc, if know side, angle, and area of a triangle.

T=2.5 c=2 b=4 ... find side a if we know sides b, c, and the area of triangle T.

ma=1 b=2.5 c=2 ... calculation of the triangle if we know one median and any two sides.

ma=1 mb=2.5 mc=2 ... triangle calc by three medians.

ha=220, hb=165 hc=132 ... triangle calc by three heights.

a=7 β=40 mc=5 ... triangle calc by one side, one angle, and one median.

a:b:c=2:3:4 T=2.5 ... a triangle where the known side ratio and its area.

A:B:C=1:4:5 a=2 ... calculating triangle if we know the ratio of the internal angles and one side.

B=45 c=10 a=9 ... triangle calc by two sides a,c and included angle B.

A=25 C=80 b=22

A=35 C=26 a=10

a=3 C=90 c=5 ... how to enter right-angled triangle.

a=3 β=25 γ=45 ... triangle calc if we know the side and two angles.

a=3 β=25 T=12 ... triangle calc, if know side, angle, and area of a triangle.

T=2.5 c=2 b=4 ... find side a if we know sides b, c, and the area of triangle T.

ma=1 b=2.5 c=2 ... calculation of the triangle if we know one median and any two sides.

ma=1 mb=2.5 mc=2 ... triangle calc by three medians.

ha=220, hb=165 hc=132 ... triangle calc by three heights.

a=7 β=40 mc=5 ... triangle calc by one side, one angle, and one median.

a:b:c=2:3:4 T=2.5 ... a triangle where the known side ratio and its area.

A:B:C=1:4:5 a=2 ... calculating triangle if we know the ratio of the internal angles and one side.

What do the symbols mean?

a, b, c ... sides BC, AC, AB

A, B, C or α, β, γ ... internal angles

ha, hb, hc ... altitudes (heights)

ma, mb, mc ... medians

T ... area

p ... perimeter

s ... semiperimeter

## Triangles in word problems:

- Triangle: 5072

change the triangle in a ratio of 3:4 sides of a triangle: a = 7 cm b = 6 cm c = 5 cm - Triangle 7142

ABC triangle, alpha = 54 degrees 32 minutes, beta = 79 degrees. What are the sizes of the exterior angles? - An isosceles 2

An isosceles triangular frame has a measure of 72 meters on its legs and 18 meters on its base. Find the perimeter of the frame. - Circumscribed 29561

Construct an isosceles triangle if a given circle circumscribed with a radius r = 2.6 cm is given.

- Intersection 64854

Draw any triangle. Make the axis of its two sides. Their intersection is point S. (a) Measure the distance of point S from all three vertices (b) Draw the axis of the third party. - The sides 7

The sides of the triangle are 5.2, 4.6, and x. If the PERIMETER of the triangle is 11.2 feet, what is the length of the unknown side? (hint: draw a picture) - A triangle 10

A triangle has vertices at (4, 5), (-3, 2), and (-2, 5). What are the coordinates of the vertices of the image after the translation (x, y) arrow-right (x + 3, y - 5)? - Triangular 82269

A gardener plants one row of tulips around a triangular bed with sides of 5 m, 6 m, and 10 m. How many tulip bulbs does he need if he wants to plant 8 bulbs on a length of 1 m? - Height 40911

At what height does the 15 m ladder touch the wall if its lower end is 2.5 m away from it?

- Diagonal

Can a rhombus have the same length, diagonal, and side? - Diagonal

Can it be a diagonal diamond twice longer than its side? - Angle

Draw angle |∠ ABC| = 30° and build its axis. What angle is between the axis angle and arm of angle? - QuizQ

An isosceles triangle has two sides of length 7 km and 39 km. How long is a third side? - Centre of mass

The vertices of triangle ABC are from the line p distances 3 cm, 4 cm, and 8 cm. Calculate the distance from the center of gravity of the triangle to line p.

more triangle problems »

#### Look also at our friend's collection of math problems and questions:

- triangle
- right triangle
- Heron's formula
- The Law of Sines
- The Law of Cosines
- Pythagorean theorem
- triangle inequality
- similarity of triangles
- The right triangle altitude theorem