What is the area of an equilateral triangle that has a side length of 4? Geometry Perimeter, Area, and Volume Perimeter and Area of Triangle 1 Answer Suryin =) Dec 3, 2015 #A= 6.93# or #4sqrt3# Explanation: #A=sqrt3/4a^2# a#rarr# side which #4# #A=sqrt3/(4)4^2# #A=sqrt3/(4)16# #A=(16sqrt3)/4# #A=(cancel4(4)sqrt3)/cancel4# #A=4sqrt3# #sqrt3# #rarr# # 1.73205080757# #4sqrt3 = 6.92820323028# #A= 6.93# Answer link Related questions What is the perimeter of a triangle with sides 1#3/5#, 3#1/5#, and 3#3/5#? How do you find the area of the trapezoid below? What is the area of a 45-45-90 triangle, with a hypotenuse of 8mm in length? What is the perimeter of an isosceles triangle whose base is 16 cm and whose height is 15 cm? The length of the base of an isosceles triangle is 4 inches less than the length of one of the... What is the value of the hypotenuse of an isosceles triangle with a perimeter equal to #16 + 16sqrt2#? How many isosceles triangles can be made in the x-y plane that satisfy all of the following... Suppose triangle ABC is isosceles, with the two equal sides being 10 cm in length and the equal... What is the basic formula for finding the area of an isosceles triangle? The length of a leg of an isosceles right triangle is #5sqrt2# units. What is the length of the ... See all questions in Perimeter and Area of Triangle Impact of this question 4509 views around the world You can reuse this answer Creative Commons License