b×h

2

1/2 h×p

*p=perimeter

2×b×h + l×w×h

     2

n (1/2 bl) + B

*l = slant height

∏r² + ∏rl

*l = slant height

volume of a cube

1 km = 1000m

1 hm = 100m

1 dam = 10m

*m = 1m

1 dm = 0.10m

1 cm  = 0.01m

1 mm = 0.001m

1 yard = 3 ft.

1 foot  = 12 in.

1 mile = 1760 yd. or 5280 ft.

1 kg = 1000g

1 hg = 100g

1 dag = 10g

*g = 1g

1 dg = 0.10 g

1 cg = 0.01g

1 mg = 0.001g

English weight

1 lb = 16 oz.

1 ton  = 2000 lbs

1 kL = 1000 L

1 hL = 100 L

1 daL = 10 L

*L  = 1L

1 dL = 0.10 L

1 cL = 0.01 L

1 mL = 0.001L

1 gallon = 4 quarts or 128 fl. oz.

1 quart  = 2 pints or 32 fl.oz

1 pint = 2 cups or 16 fl. oz.

1 cup  = 8 fl.oz

A=  m   

m+n

Â=   n   

    m+n

Χ=Σx

    n

S² = Σx²-(Σx)²

           n

n-1

ac ₌ bc ₌ ab

dc   ec    de

how do you find that number of sides

of a regular polygon when given interior angle?

How do you find the interior angle of a

regular polygon when given the number of sides?