A: 40 because supplements add up to 180
B: 54 because complements add up to 90
Answer: 4(−a+1)(a−1)
Step-by-step explanation:
Answer: acute angles are higher that 0° and smaller than 90°
Step-by-step explanation: obtuse are between 90° and 180°
Answer:
it looks like an triangle in the option above lol
