+0  
 
0
1403
1
avatar+76 

An equilateral triangle with side length 18 cm is shown in the diagram, work out the height of the triangle.

MathsMia  Apr 18, 2017
 #1
avatar+92856 
+1

 

There are a couple of ways to do this......but.....if we divide the triangle in half with a vertical line, we will have a right triangle with one leg  = 9   and the hypotenuse  =18.....and the height will form the other leg

 

Using the Pythagorean Theorem  the height, H  =

 

sqrt ( 18^2 - 9^2)   =  sqrt (243)   = sqrt (81 * 3)  =   9 sqrt(3)  cm

 

 

cool cool cool

CPhill  Apr 18, 2017

6 Online Users

avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.