Question

Find the altitude of an equilateral triangle, if each side of the triangle has a length of 20 meters.

a) 10 squareroot 3
b) 10 squareroot 2
c) 10 meters
d) 20 meters

Answer 1

pythagorean's theorem. a^2 +b^2 = c^2

Answer 2

a) 10 squareroot 3

Answer 3

not pythagorean

Answer 4

Draw it out. You want the altitude. Split the triangle in half.

Answer 5

you find that the hypotenuse is 20 and the base 10.

Answer 6

plug it in. c is the hypotenuse. the base can be either a or b. then solve for the variable.

Answer 7

step 1. a^2 +b^2 = c^2
step 2. 10^2 + b^2 = 20^2
step 3. b^2 = 20^2 - 10^2
step 4. b^2 = 400 - 100
step 5. b^2 = 300
step 6. b = sqrt (300)
step 7. b = 10*sqrt(3) [Here I pulled out 100 from 300 and rooted it, giving me 10]

Answer 8

@moneybird yes it is pythagorean's theorem. I just proved it

Answer 9

@moneybird giving answers doesn't help anybody...You must provide steps. Otherwise they won't be able to answer the question properly

Answer 10

Well i don't have any steps i guessed the answer in my head

Answer 11

Lol guessing. Horrible :[ .

Answer 12

Guessing is good when you can guess the right answer

Answer 13

You should learn the proper steps though :[