Angles Worksheets - Free Printable

Problem Overview:

The task involves finding the value of angle \( A \) in each diagram, given that the angles are supplementary. Supplementary angles are two angles whose measures add up to \( 180^\circ \). Therefore, if one angle is known, the other can be calculated using the formula:

\[
A = 180^\circ - \text{(given angle)}
\]

We will solve each problem step by step.

---

Solution for Each Problem:

#### 1.
- Given angle: \( 60^\circ \)
- Calculation:
\[
A = 180^\circ - 60^\circ = 120^\circ
\]
- Answer: \( 120^\circ \)

#### 2.
- Given angle: \( 150^\circ \)
- Calculation:
\[
A = 180^\circ - 150^\circ = 30^\circ
\]
- Answer: \( 30^\circ \)

#### 3.
- Given angle: \( 141^\circ \)
- Calculation:
\[
A = 180^\circ - 141^\circ = 39^\circ
\]
- Answer: \( 39^\circ \)

#### 4.
- Given angle: \( 72^\circ \)
- Calculation:
\[
A = 180^\circ - 72^\circ = 108^\circ
\]
- Answer: \( 108^\circ \)

#### 5.
- Given angle: \( 153^\circ \)
- Calculation:
\[
A = 180^\circ - 153^\circ = 27^\circ
\]
- Answer: \( 27^\circ \)

#### 6.
- Given angle: \( 45^\circ \)
- Calculation:
\[
A = 180^\circ - 45^\circ = 135^\circ
\]
- Answer: \( 135^\circ \)

#### 7.
- Given angle: \( 50^\circ \)
- Calculation:
\[
A = 180^\circ - 50^\circ = 130^\circ
\]
- Answer: \( 130^\circ \)

#### 8.
- Given angle: \( 100^\circ \)
- Calculation:
\[
A = 180^\circ - 100^\circ = 80^\circ
\]
- Answer: \( 80^\circ \)

#### 9.
- Given angle: \( 158^\circ \)
- Calculation:
\[
A = 180^\circ - 158^\circ = 22^\circ
\]
- Answer: \( 22^\circ \)

#### 10.
- Given angle: \( 98^\circ \)
- Calculation:
\[
A = 180^\circ - 98^\circ = 82^\circ
\]
- Answer: \( 82^\circ \)

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Final Answers:

\[
\boxed{120^\circ, 30^\circ, 39^\circ, 108^\circ, 27^\circ, 135^\circ, 130^\circ, 80^\circ, 22^\circ, 82^\circ}
\]