Angles related to line

Which of the following is the correct abbreviation descriding the sum of all angles on a straight line

• ∠ on a line

• ∠s on a st. line

• adj. ∠s on st. line

• adj. ∠ on st. line

• adj. ∠s on a st. line

Which of the following is the correct abbreviation describing the sum of all angles at a point?

• ∠s on a pt.

• ∠ at a pt.

• ∠s at a pt.

• adj. ∠s at a pt.

• adj. ∠s on a pt.

AOB is a straight line. Find a in the figure.

• 40°

• 60°

• 180°

• 120°

AOB is a straight line. FInd b in the figure.

• 75°

• 65°

• 55°

• 45°

AOB is a straight line. Find x in the figure.

• 56°

• 94°

• 142°

• 124°

AOB is a straight line. FInd y in the figure.

• 110°

• 100°

• 90°

• 80°

Find c in the figure.

• 50°

• 130°

• 160°

• 230°

Find x in the figure.

• 60°

• 65°

• 70°

• 75°

Find x in the figure.

• 163°

• 157°

• 153°

• 147°

Find y in the figure.

• 42°

• 41°

• 40°

• 39°