2. Angles DCA and BCA are not supplementary. Since the both of them add up to 90° (we know that angle c is equal to 90° because in a right square all angles are 90°) the angles would be complementary, not supplementary. Supplementary angles add up to 180°
Here, we have, Mass = 43 g Volume = 12 cm^3 Density = ? Using Formula, Mass = Density * Volume => 43 g = Density * 12 cm^3 => Density = 43/12 g/cm^3 => Density = 3.58333 g/cm^3
