Answer:
Right angle, and angle IJK
Step-by-step explanation:
So all 4 bags of sugar yielded 5 and 1/2 cups..... well.. how many in each one? well, let's split the 5 and 1/2 evenly in 4 pieces.
Since it's isosceles, ∠ABC = (180-30) / 2 = 75
9.9=9×9=81 and you have to multiply