State whether the following statements are true or false :
(a) Bread is an example of solid foam
(b) Sponge is an example of solid sol.
State whether the following statement is true or false.
180º is an example of an obtuse angle.
State whether the following statement is true or false. 90∘ is an example of an obtuse angle.
State whether the following statement is True or False: Polythene is an example of synthetic fibre.