To solve this problem...
Find the missing angle "?":
When a line meets another line, the two angles formed add up to 180
. See the
angle rule notes
for an explanation of intersecting lines.
Enter your answer:
Your answer may be in any of the following forms:
Decimal (must be accurate to 4 places)
Fraction (e.g., '3/4')
Mixed number (e.g., '4 3/4')
Scientific notation (e.g., '1.2e-02')
Single words, correctly spelled (e.g.,'isosceles')