We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
123
2
avatar

I need to find the volume of these but I am having a difficult time. Sorry. Please help!

 Sep 5, 2018
 #1
avatar+101161 
+1

First one :

We have a right triangle  as a base...the two legs are 6 and  8....the area of a right triangle  = (1/2) (product of the legs) =

(1/2) (6 * 8)  = (1/2) (48)  = 24 m^2  = base area

And the height of this triangular pyramid is 8m

So...the volume is  (1/3) (base area ) ( height) =  (1/3) (24) (8)  = (8) (8)  =  64 m^3

 

Second one :

If you look at the front face of this prism, it's just a trapezoid with a height of 4.3 cm and bases of 9cm  and 4 cm

The area of this trapezoid  is   (1/2) * height * (sum of the bases)  = (1/2)(4.3) ( 9 + 4)  =  (1/2) (4.3) (13)  = 27.95 cm^2

Now...if we consider all these similar trapezoids to  be  "stacked" to a depth of  6cm...the volume becomes

6 (27.95 )  =  167.7 cm^3

 

 

cool cool cool

 Sep 5, 2018
edited by CPhill  Sep 5, 2018
 #2
avatar
+1

Thank you for all your help!! Have a wonderful day/night!

Guest Sep 5, 2018

13 Online Users

avatar