Question

iii. solve the following items. (7 poi

1. if m∠doa = 68, find m∠dot.

Explanation:

Step1: Note angle - sum property

$\angle DOT+\angle DOA = 180^{\circ}$ (linear - pair of angles).

Step2: Solve for $\angle DOT$

$\angle DOT=180^{\circ}-\angle DOA$.
Substitute $\angle DOA = 68^{\circ}$ into the equation: $\angle DOT=180 - 68$.
$\angle DOT = 112^{\circ}$.

Answer:

$m\angle DOT = 112^{\circ}$