Answer:


Explanation:
From inspection of the given diagram, we can see that ∠NAZ is congruent to ∠YBR, since they are both labelled 47°.
We use identical tick marks to indicate congruent angles. Therefore, as ∠NAZ and ∠MCS both have one tick mark, this means they are congruent. So the measure of ∠MCS is also 47°.
The remaining two angles, ∠PDT and
, do not have a tick mark. This indicates that these angles are congruent (and different to the other three angles).
The symbol ≅ is used to show congruency. If we want to represent angle PDT is congruent to angle
, we write it as
.
This literally means "angle PDT is congruent to angle
".
If two angles are congruent, then their angle measures are equal.
When the angle measures are equal we write it as
.
The "m" means "measure", the "∠" means "angle", and "=" means "is equal to". So
means "the measure of angle PDT is equal to the measure of angle
".