8. For this problem, we simply need to take the volume of this cube. As we can remember, the formula for volume is simply length times width times height. In this figure, we have a length of 6, a width of 3, and a height of 4. So all we need to do to find the area is multiply.
6 * 3 = 18
18 * 4 = 72
The volume of our figure is 72 cubic inches.
9. We are trying to find the triangle that fits the description of obtuse and scalene. An obtuse triangle is one which has one angle with a measure of more than 90°. A scalene triangle is one in which no two sides are similar.
Triangle 9a fits this description, so you would mark yes on it.
Triangle 9b does NOT fit the description, since all angles have a measure of less than 90°, so we will mark a no on it.
Triangle 9c also does not fit the description, since it has an angle with a measure of exactly 90° (as indicated by the little square in the corner of the angle), so we will mark no on this one as well.
And there we have it.
Hope that helped! =)
