SOLUTION: the perimeter of an equilateral triangle is 39 cm. find the length of an altitude of the triangle
Algebra.Com
Question 542076: the perimeter of an equilateral triangle is 39 cm. find the length of an altitude of the triangle
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
the perimeter of an equilateral triangle is 39 cm. find the length of an altitude of the triangle
---------
Draw a picture of an equilateral triangle.
Draw an altitude (which is a perpendicular bisector of the base).
---------
Use Pythagoras to find the altitude:
h^2 + (39/2)^2 = 39^2
---
h^2 = (3/4)39^2
---
h = (39/2)sqrt(3) cm
========================
Cheers,
Stan H.
========================
RELATED QUESTIONS
The length of an altitude of an equilateral triangle is 15cm. Find the perimeter of the... (answered by Gogonati)
The perimeter of an equilateral triangle is 45 meters. find the length of an... (answered by tommyt3rd)
the side of an equilateral triangle is 16 cm. find the length of its altitude
(answered by richwmiller)
Find the length of a side of an equilateral triangle whose altitude is 17.32... (answered by nerdybill)
the perimeter of an equilateral triangle is 21 inches. find the length of the... (answered by drj)
if the perimeter of an equilateral triangle is 54 cm what is the length of an... (answered by 1335)
the perimeter of an equilateral triangle is 240 ft. find the length of an altitude of the (answered by edjones)
The perimeter of an equilateral triangle is 45 centimeters. Find the length of an... (answered by tutor_paul)
The length of one side of an equilateral triangle is 10 cm. Find the altitude of the... (answered by wilft1,solver91311)