Question

Question 24

Fill in the blanks to make the statement true.

The number of angles less than ${180}^{\circ }$ is ___ and their names are _______.

Answer 1

There are 12 angles that are less than ${180}^{\circ }$ possible from the given figure.

The 12 angles are ∠ OAB, ∠ OBA, ∠ OAC, ∠ OCA, ∠OCD, ∠ODC, ∠ AOB, ∠ AOC, ∠ COD, ∠ DOB, ∠ BAC and ∠ ACD.