A triangle has sides with lengths: 7, 9, and 15. How do you find the area of the triangle using Heron's formula? Trigonometry Triangles and Vectors Area of a Triangle 1 Answer VinÃcius Ferraz Jun 13, 2018 #A = 1/4 * sqrt 6851# Explanation: #p = (7 + 9 + 15)/2 = 15.5# #A = sqrt{p(p-7)(p-9)(p-15)}# #A = sqrt{15.5 times 8.5 times 6.5 times 0.5}# #A = sqrt frac{4281875}{10000} = sqrt frac{13*17*31}{16}# Answer link Related questions How do you find the area of a triangle with 3 sides given? 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? See all questions in Area of a Triangle Impact of this question 2242 views around the world You can reuse this answer Creative Commons License