Answer:
C
Explanation:
all the others are correct so this must be untrue
Learning to write/memorize it
You must be talking about the assassination of Archduke Franz Ferdinand of Austria. This was an event which triggered the start of WWI.
Answer:
FIRST ONE IS WRONG AND THE LAST TWO ARE CORRECT
Explanation:
A+B=90 IS WRONG ITS 180
90+B=180 IS RIGHT BECAUSE ITS 90 + A 90 DEGREE ANGLE
180-B=A IS CORRECT BECAUSE B IS 90 SO 180 - 90 = A. A=90
