+0  
 
0
54
1
avatar

"A triangle has a ratio of 3:4:5. If its perimeter is 120 m, what is its area in square meters?"

 

Based on the ratio, the triangle seems scalene. I have computed for the lengths, and they are 30 m, 40 m, and 50 m. However, I am stuck because I do not know which of them should be the base or the height in order for me to use the formula for the triangle's area = 1/2 (b) (h) 

 

Please help.

 Dec 23, 2018
 #1
avatar+94279 
+1

Notice that we have 3 + 4 + 5 =    12 equal parts of 120m  = 10 m each 

 

3 of these  =  30m

4 of these = 40m

5 of these i= 50m

 

 

A 3-4-5  triangle is a Pythagorean right triangle....so.....each side of this triangle is 10 times as much

 

So..We have a right triangle  with legs of 30m and 40m  and a hypotenuse of 50m

 

The area is     product of legs / 2  =   30 * 40 /  2    =    600 m^2

 

 

 

cool cool cool

 Dec 23, 2018

34 Online Users

avatar
avatar
avatar
avatar
avatar
avatar
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.