A triangle has sides of length 5,6 and 7 units. Find the largest angle to the nearest minute


Thanks in advance

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.



Post what you did.

You'll also have to convert the digits after the decimal point into minutes (60 minutes in a degree)