Answer:
Step-by-step explanation:
ppleasepplease share the answers when got them
Answer:
hmmm i think you need to dod
Step-by-step explanation:
yeah
The answer you are looking for is 14.
Answer:
Sometimes
Step-by-step explanation:
Examples:
-5 + 10 = 5 FALSE
-10 + 5 = -5 TRUE
Answer:
see explanation
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°, thus
∠1 = 180° - (72 + 57)° = 180° - 129° = 51°
The right angle at the left vertex is composed of 72° and ∠2, thus
∠2 = 90° - 72° = 18°
57° and ∠3 form a straight angle and are supplementary, thus
∠3 = 180° - 57° = 123°
∠4 = 180° - (∠2 + ∠3 ) ← sum of angles in a triangle
∠4 = 180° - (18 + 123)° = 180° - 141° = 39°
