angles
an angle more than 90 degrees
obtuse
sas
side-angle-side
how to find volume the volume of a square
base x width x height
an angle less than 90 degrees
acute
sss
side-side-side
how to find the area of a square
length x width
90 degree angle
right angle
aas
angle-angle-side
how to find the area of a circle
pi x R2