trach171
Nov 14, 2009, 06:01 PM
A triangle has sides of length 5,6 and 7 units. Find the largest angle to the nearest minute
Thanks in advance
Unknown008
Nov 14, 2009, 08:39 PM
Draw a diagram of the triangle, a sketch will do, with each side larger than the previous.
Look for the largest angle. You'll see that it lies between the sides of 5 and 6 units.
Then, use the cosine rule to fond the size of the angle.
a^2 = b^2 + c^2 - 2bccos(A)
Post what you did.
Capuchin
Nov 15, 2009, 03:37 AM
You'll also have to convert the digits after the decimal point into minutes (60 minutes in a degree)