# Lengths of sides of triangles

Calculate the length of the sides opposite to the given angle in triangle ABC.

B = 135.5 deg

BC = 5 cm

AB = 8 cm

[email_link] http://solvemaths.in/lengths-of-sides-of-triangles/GeometryCalculate the length of the sides opposite to the given angle in triangle ABC.
B = 135.5 degBC = 5 cm
AB = 8 cm

Kishor
Kumarhi.friend_zone@rocketmail.comSubscriberSOLVE - ΜΔΓΗŠ
<ABC=135.5°, a=5cm ,c=8cm b=AC=?

Using cosine rule

b²=a²+c²-2acCosB

b²=5²+8²-2.5.8Cos135.5

b²=25+64-80(-0.7133)

b²=89+57.064

b²=146.064

Taking the square root of both sides

b=√146.064

b≈12.O85cm

Thank you, Mark.

The answer is correct