Question

In triangle abc then ab is longest side then proved that angle c less than 60

Answer 1

ab is the longest side.
angle B =90.
angle A+B+C=180
90+A+C=180
A+C=180-90
A+C=90
In right triangle one angle =90
the sum of the other two angle=90
A=90/2=45
C=90/2=45
angle C =45
Hence, proved.