geometry chapter 11 vocab and formulas

circumference of a circle

dπ or 2πr

arc length formula

arc measure/360 times 2πr

distance traveled

number of revolutions times circumference

area of a circle

πr squared

population density

number of people/area of land

area of a sector

arc measure/360 times πr squared

area of a triangle

½ bh

area of a parallelogram

bh or s squared

area of a kite

½ d1 times d2

area of a rhombus

d1 times d2 /2

area of a trapezoid

½ (a + b) h

measure of central angle

360/ number of sides

volume of a 2 base solid

V= Bh

B= area of base

density

mass/volume

volume of a 1 base solid

V- 1/3 Bh

surface area of a cone

Sa= πr squared + πrl

surface area of a sphere

4πr squared

volume of a sphere

4/3 πr cubed