Ethan was given a triangle with the following measurements: ∠A = 72° and ∠B = 55°.

What is the measurement of ∠C?
A.33°
B.55°
C.45°
D.53°

In any triangle, the sum of all three interior angles is always \( 180^\circ \). 

Given that:

- \( \angle A = 72^\circ \)
- \( \angle B = 55^\circ \)

We can calculate \( \angle C \) as follows:

\[
\angle C = 180^\circ - \angle A - \angle B
\]
\[
\angle C = 180^\circ - 72^\circ - 55^\circ = 53^\circ
\]

Thus, the measurement of \( \angle C \) is \( 53^\circ \).

The correct answer is **D. 53°**.

Would you like more details or have any questions?

Here are some related questions you might find helpful:
1. How do you find the third angle of a triangle?
2. What are the properties of the angles in a triangle?
3. Can a triangle have two angles greater than 90 degrees?
4. How do you classify triangles based on their angles?
5. What is the difference between an obtuse and an acute triangle?

**Tip:** Always remember, the sum of the interior angles of a triangle is 180°.

Ethan was given a triangle with the following measurements: ∠A = 72° and ∠B = 55°. What is the measurement of ∠C? A.33° B.55° C.45° D.53°

Learn how to calculate the third angle of a triangle when given ∠A = 72° and ∠B = 55°. Using the angle sum theorem of a triangle, find the measurement of ∠C with a step-by-step explanation. This problem is suitable for students in Grades 6-8.

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