1. ∠A and ∠B are complementary
2. ∠A + ∠B = 90° and ∠B + ∠C = 90°
3. ∠A = 90° - ∠B
4. ∠C = 90° - ∠B
5. ∠A ≅ ∠C
(1-1/3)/6
each friend gets 0.1 of the salad compared to the 0.16 they would have gotton
60° + 70° + y° = 180°
130° + y° = 180° ~Subtract 130° from both sides
y° =50°
y=x because they are both vertical angles
x° = 50°
There are only eight of them, because 9² is more than 80 .
If I must, here they are:
1² = 1
2² = 4
3² = 9
4² = 16
5² = 25
6² = 36
7² = 49
8² = 64
You should be able to rattle off this list.
