7. (a) Find the length of a cuboid of volume 24 cm if its breadth and height are 3 cm and 2 cm respectively. (b) The length and breadth of a cuboid are 10 cm and 8 cm respectively. If the volume of the cuboid is 480 cm", find the height of the cuboid.

What is the next step in the given proof? choose the most logical approach. a. statement: m 1 + m 2 + 2(m 3) = 180° reason: angle addition b. statement: m 1 + m 3 = m 2 + m 3 reason: transitive property of equality c. statement: m 1 = m 2 reason: subtraction property of equality d. statement: m 1 + m 2 = m 2 + m 3 reason: substitution property of equality e. statement: 2(m 1) = m 2 + m 3 reason: substitution property of equality