Question

to find the area of a triangle do you add or multiply all 3 sides?

Answer 1

NONE!! :D

There are specific formulae for different triangles. :D

Area of a right triangle is = height times base over 2
Area of equilateral = sqrt3 * side * side over 4
Area of Isosceles = Altitude times base/2

Look up some videos on youtube for more!! :D

Understood? :)

Answer 2

I am not getting your question that well @Bbambino1976 . :/

Answer 3

To find PERMETER YOU ADD ALL SIDES!! :D

Answer 4

Forgive me, it"s an equilateral. So

Answer 5

aND What are you finding?
Area or permeter? :D

Answer 6

I'm trying to find the area, with 1600 on a side, with vertices at 3 points?

Answer 7

http://www.mathwords.com/a/area_equilateral_triangle.htm

Answer 8

http://www.basic-mathematics.com/area-of-an-equilateral-triangle.html

Answer 9

133.333 how does that look?

Answer 10

Are you sure the side is 1600?
Because 133.333333 seems to be incorrect. :|

Answer 11

the question says its 1600 km on a side,hey how did you know that?

Answer 12

it says the Bermuda triangle is a equilateral triangle 1600k on a side with vertices in Bermuda, Puerto Rico, and Florida coast. Assuming it is flat, what is the approximate area?

Answer 13

a2 = (a/2)2 + h2

a2 = a2/4 + h2

a2 − a2/4 = h2

4a2/4 − a2/4 = h2

3a2/4 = h2

h = √(3a2/4)

h = (√(3)×a)/2

Area = (base × h)/2

base × h = (a × √(3)×a)/2 = (a2× √(3))/2

Dividing by 2 is the same as multiplying the denominator by 2. Therefore, the formula is

equilateral-triangle-formula-image

Answer 14

so do i take 1600 square it then divide it by two?

Answer 15

no that can't be right it's only 20