geometry chapter 1 lesson 5
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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
