Okay, so first, lets break it down to a 2D triangle with the length of 9, and a height of 4. We know for 2D triangles that the area is [tex]\frac{LH}{2}[/tex] where L=Length, H=Height.
(9•4)/2=18
Now let's do 18x5.
Your area is 90 centimeters cubed as it is 3D.
Please do not hesitate to ask any questions.
#learnwithbrainly
