Classify each triangle by its angle properties in this math worksheet.

To solve the problem of classifying each triangle based on its angle properties, we need to identify whether each triangle is acute, right, or obtuse. Here's a step-by-step explanation:

Definitions:

1. Acute Triangle: All three angles are less than 90°.
2. Right Triangle: One angle is exactly 90°.
3. Obtuse Triangle: One angle is greater than 90°.

Solution:

Let's analyze each triangle one by one:

#### 1.
- The triangle has one angle that appears to be greater than 90°.
- Classification: Obtuse Triangle

#### 2.
- The triangle has one angle that appears to be exactly 90°.
- Classification: Right Triangle

#### 3.
- All three angles appear to be less than 90°.
- Classification: Acute Triangle

#### 4.
- All three angles appear to be less than 90°.
- Classification: Acute Triangle

#### 5.
- The triangle has one angle that appears to be exactly 90°.
- Classification: Right Triangle

#### 6.
- All three angles appear to be less than 90°.
- Classification: Acute Triangle

#### 7.
- All three angles appear to be less than 90°.
- Classification: Acute Triangle

#### 8.
- The triangle has one angle that appears to be greater than 90°.
- Classification: Obtuse Triangle

#### 9.
- All three angles appear to be less than 90°.
- Classification: Acute Triangle

#### 10.
- All three angles appear to be less than 90°.
- Classification: Acute Triangle

Final Answer:

\[
\boxed{
\begin{array}{ll}
1. & \text{Obtuse Triangle} \\
2. & \text{Right Triangle} \\
3. & \text{Acute Triangle} \\
4. & \text{Acute Triangle} \\
5. & \text{Right Triangle} \\
6. & \text{Acute Triangle} \\
7. & \text{Acute Triangle} \\
8. & \text{Obtuse Triangle} \\
9. & \text{Acute Triangle} \\
10. & \text{Acute Triangle} \\
\end{array}
}
\]