2
chromosomes grouped in order by pairs.
23 pairs
side- angle- side
the factor pairs of 80 are as shown: 1x80, 2x40, 5x16, 8x10, 4x20
90
bac
perpendicular
As there is no system of equations shown, there are zero solutions.
Acute.
45
Apex (Angle)The apex is the pointed tip of a cone. The apex angle is the angle between the lines that define the apex, as shown to the left.
γ Back-off angle or clearance angle L w Length of the workpiece (not shown.