Question

what is the surface area formula of a 1. rectangular prism 2. triangular prism 3. cylinder 4.cone5. pyramid 6. sphere

Answer 1

The formula for the surface area of rectangular prism is,

$SA=2(l\cdot b+l\cdot h+b\cdot h)$

The formula for the suface area of triangula prism is,

$\begin{gathered} SA=2\cdot\frac{1}{2}bh+l\lbrack a+b+c\rbrack \\ =bh+l\lbrack a+b+c\rbrack \end{gathered}$

The formula for the surface area of cylinder is,

$SA=2\pi rh+2\pi(r)^2$

The formula for the surface area of cone is,

$SA=\pi rl+\pi(r)^2$

The formula for the surface area of pyramid is,

$\begin{gathered} SA=4\cdot\frac{1}{2}\cdot b\cdot h+b\cdot b \\ =2bh+b^2 \end{gathered}$

The formula for the surface area of sphere is,

$SA=4\pi(r)^2$