A) 90-55=35 since a right angle is 90 total\
b)ii
Answer:
x + 3 + 45° = 180°. isosceles triangle
x = 180° - 45°-3°
x = 132°
90° + x = 180°
x =180° - 90°
x = 90°
Answer:

Step-by-step explanation:
Distribute parentheses:

Apply minus - plus rule:

Simplified:

Its complicated but..