How do you find the area of a triangle with 3 sides given? Trigonometry Triangles and Vectors Area of a Triangle 1 Answer Mark D. Jun 26, 2018 Use Heron's formula with sides a,b and c #s=[a+b+c]/2# Area= #sqrt[s(s-a)(s-b)(s-c)]# Answer link Related questions What is the area of a equilateral triangle with a side of 12? How do you find the area of a triangleABC, if #angleC = 62^@#, #b = 23.9# , and #a = 31.6#? How do you find the area of a triangleGHI, if #angleI = 15^@#, #g = 14.2# , and #h = 7.9#? What is Heron's formula? When do you use Heron's formula to find area? How do you find the area of a triangle ABC, if #a = 23#, #b = 46# , and #c = 41#? Question #f2e4c How do you find the area of the triangle given c= 4, A= 37 degrees, B= 69 degrees? How do you find the area of the triangle given C=85 degrees, a= 2, B= 19 degrees? How do you find the area of the triangle given A= 50 degrees, b= 12, c=14? See all questions in Area of a Triangle Impact of this question 229803 views around the world You can reuse this answer Creative Commons License