Question

Four angles of a pentagon are 1000 , 750 , 1200 and 700 , find the fifth angle .​

Answer 1

Answer:

Sum of all angles of a pentagon

=(5-2)×180

=3×180

=540°

Let the 5th angle be x

120+100+75+70+x=540

365+x=540

x=540-365

x=175

Answer 2

Answer:

Sum of all angles of a pentagon

=(5-2)×180

=3×180

=540°

Let the 5th angle be x

120+100+75+70+x=540

365+x=540

x=540-365

x=175