[https://poweronecalc.s3.amazonaws.com/templates/triangle_solver.png]

a (rise) = 0

b (run) = 0

c (hypotenuse or rake) = 0

A ° = 0

B ° = 0

C ° = 0

Area = 0

Perimeter = 0

Solves various triangles.

A definition of various triangle types:

- SSS: Enter side a (rise), side b (run), side c (rake) then select angles A, B, C.

With an SSS triangle if the two sides a, and b combined, or (a+b) is less than or equal to the hypotenuse (rake), then there is no solution.

- SAS: Enter side a (rise), side b (run) and angle C, then select hypotenuse side c (rake).

- AAS: Enter any two angles plus one side.

Always calculate the third angle before the two remaining sides. Then select [icon--app-unknown-inverse] top side first then the next one down.

If two sides are known, select the third side then the unknown angles. For example: Sides a (rise), b (run) and angle C are known. Select [icon--app-unknown-inverse] Side c (rake) then angles A and B.

- SSA: This type of triangle can have two solutions, one solution or no solution.

- Area and Perimeter: automatically calculated using selected units.

Precision can be changed. By selecting setting in the menu (...) in the top right corner.

[https://poweronecalc.s3.amazonaws.com/templates/triangle_solver.png]

Contributed by Gary Wiese.

Find the length of rafters with a roof pitch of 4:12.

-Enter a 4in Rise

-Enter a 12in Run

-Enter 90 degrees for C

Select Rake, angles A and B.

-Rake = 1ft 5/8

-A = 18.4°

-B = 71.6°

Change Run to 15 feet and select Rise and then Rake.

Rise is now 5ft and Rafter length is 15ft 9&3/4in or 15ft 9&47/64in.

Need to know the angle of a stairway with a rise of 6in and run of 9in.

Enter 90 for angle C then select Rake, angle A and angle B.

-Rake = 10&13/16in

-A = 33.7°

-B = 56.3°

Change the rise to 8" and select Rake, angles A and B.

-Rake = 1ft 1/16in

-A = 41.6°

-B= 48.4°

This is an example of a oblique triangle.

Enter Rise 5ft 6&1/2in, Run 8ft 4&3/4in, and Rake 9ft 5&3/4in.

-Angle A = 35.5°

-Angle B = 61.5°

-Angle C = 83.0°

All the angle will total 180°.

a (rise)

b (run)

c (hypotenuse or rake)

A °

B °

C °

Area

Perimeter

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