A right triangular prism is constructed so that it’s height is equal to the leg length of the base. What expression represents the volume of the prism, in cubic units? A. 1/2x^3 B. 1/2x^2+x C. 2x^3 D. 2x^2+x

A right triangular prism is constructed so that its height is equal to the leg length of the base What expression represents the volume of the prism in cubic un class=

Respuesta :

Answer:

Option A is correct.

The volume of prism= [tex]\frac{1}{2}x^3[/tex] cubic units

Explanation:

Volume of the right triangular prism(V) is given by the formula:

[tex]V = B \cdot h[/tex] ; where B is the area of the  base, and h is the height.

Given: The height of the prism(h) = x unit

The base (B) in the given figure of the prism is the right triangle with legs of length x unit and base x unit.

Area of the right angle triangle is given by: (A) = [tex]\frac{1}{2}bl[/tex] where b is the base and l is the height of the triangle respectively.

Therefore,

B = [tex]\frac{1}{2} (x) \cdot(x)[/tex] = [tex]\frac{1}{2}x^2[/tex] square unit

Substitute the value of base and height in the above given formula of volume of prism,

therefore,

Volume of the prism (V) = Bh cubic unit

                                        =[tex]\frac{1}{2}x^2 \cdot (x)[/tex]

                                        = [tex]\frac{1}{2}x^3[/tex] cubic units


Answer: A. [tex]\frac{1}{2} x^3[/tex]

Step-by-step explanation:

Since, the volume of a prism =  Base area × Height of the prism,

According to the given figure,

The prism having base of right triangle having height x and base x,

⇒ [tex]\text{ The Base area of the prism} = \frac{1}{2}\times x\times x = \frac{1}{2}x^2[/tex]

Also, the height of the given prism = x

⇒ [tex]\text{The volume of the given prism} = \frac{1}{2}x^2\times x = \frac{1}{2}x^3[/tex]

Option A is correct.