geometry chapter 1 lesson 5

circumfrence of a circle

2πr c=2 times pi times radius

area of a triangle

A= base times height A= bXh

Area of a circle

A= π r²

area of a triangle

A=1/2bh

perimeter of a triangle

P=a+b+c

area

length times width a=lXw

how to find perimiter

p=length + width ex: how evet many sides times length plus how ever many sides times length

Radius

the number inside the circle. if the radius is a straight line divide it by two, because that is the diameter not the radius