Finding Surface Area of Prisms

Formulas of Prisms

• Rectangular Prism

• Surface Area: SA=2lw+2lh+2whSA=2lw+2lh+2wh

Sphere

• Surface Area: SA=4πr2SA=4πr2

Cone

• Surface Area: SA=πr2+πrlSA=πr2+πrl
  (where ll = slant height)

Triangular Prism

(area of triangle × length of prism)

• Surface Area: SA=bh+(s1+s2+s3)LSA=bh+(s1​+s2​+s3​)L

Cylinder

Surface Area: SA=2πr2+2πrhSA=2πr2+2πrh

Fraction to Decimal

Divide the numerator by the denominator, so 3/4 = 3 divided by 4

Multiplying Decimals

Ignore the decimal point and treat it like a whole number, so 0.3 x 2 will be 03 x 2. Afterwards, count the numbers before the decimal point and that how much places you will move it to the left for your final answer.

Multiplying Fractions

Convert fractions to decimals and follow the proccess to multiply decimals.

Units

• R = Radius

• L = Length

• π = pi /3.14

• SA = Surface Area