http://jwilson.coe.uga.edu/EMT668/EMAT6680.2003.fall/Perry/Assign%204%20Triangle%20Proof/Triangle%20Proof.htm
Look at circumcenter.
A triangle has sides of length 10, 17, and 21 units. What is the radius of its
circumscribed circle?
2 answers
Damon's url is a nice proof and method of construction, but does not help much with calculating the circumradius.
R = abc/4A
Still not there, since the area A is unknown
There are various formulas for that, however, such as
Heron's formula, or
A = 1/2 ab sinC (find C using the law of cosines)
R = abc/4A
Still not there, since the area A is unknown
There are various formulas for that, however, such as
Heron's formula, or
A = 1/2 ab sinC (find C using the law of cosines)
3 answers