Free online Triangle calculator calculates undefined values from triangles for
AAA, ASA, SAS, AAS and
SSS in radius, degrees formats using Triangle Theorems.
AAA Triangle Calculator
ASA Triangle Calculator
SAS Triangle Calculator
AAS Triangle Calculator
SSS Triangle Calculator
AAA (angle, angle, angle) Formula:
C = 180 - A - B
ASA (angle, side, angle) Formula:
C = 180 - A - B
a = (c * sin(A)) / sin(C)
b = (c * sin(B)) / sin(C)
s (used to find K) = (a+b+c)/2
K = √(s*(s-a)(s-b)(s-c))
P = a + b + c
SAS (side, angle, side) Formula:
b = √(c2 + a2 - 2bc*cos(A))
A = arccos(b2 + c2 - a2)/2bc
C = 180 - A - B
s (used to find K) = (a+b+c)/2
K = √(s*(s-a)(s-b)(s-c))
P = a + b + c
AAS (angle, angle, side) Formula:
C = 180 - A - B
b = (a * sin(B)) / sin(A)
c = (a * sin(C)) / sin(A)
s (used to find K) = (a+b+c)/2
K = √(s*(s-a)(s-b)(s-c))
P = a + b + c
SSS (side, side, side) Formula:
A = arccos(b2 + c2 - a2)/2bc
B = arccos(c2 + a2 - b2)/2bc
C = 180 - A - B
s (used to find K) = (a+b+c)/2
K = √(s*(s-a)(s-b)(s-c))
P = a + b + c