Isocoleese means 2 angles are same, normally the base angles
so since it says they measure 42 rememeber that all angles in traingle add to 180 so base angles+vertex angle=180 base angles aer both 42 so 2 times 42+vertex angle=180 42 times 2=84 so if veretx angle=z then 84+z=180
Distance from point C to point D: same x coordinate, 4-1=3; 3 units Distance form point D to F: same y coordinate, 5-2=3 Perimeter is the measure of all sides 3+3+3+3=12 Solution: A. 12 units
