Worksheet answers for identifying right angles on various shapes.

Problem Description:

The task is to identify which shapes in the given images contain right angles. A right angle is an angle that measures exactly 90 degrees and is typically marked with a small square symbol.

Solution:

Let's analyze each shape one by one:

#### Shape (a):
- This is a square.
- All four angles of a square are right angles.
- Conclusion: Shape (a) contains right angles.

#### Shape (b):
- This is a triangle.
- The triangle has one marked right angle (indicated by the small square symbol).
- Conclusion: Shape (b) contains a right angle.

#### Shape (c):
- This is a hexagon.
- None of the angles in this hexagon are marked as right angles, and based on its regular structure, none of the angles appear to be 90 degrees.
- Conclusion: Shape (c) does not contain any right angles.

#### Shape (d):
- This is a triangle.
- The triangle has one marked right angle (indicated by the small square symbol).
- Conclusion: Shape (d) contains a right angle.

#### Shape (e):
- This is a rectangle.
- All four angles of a rectangle are right angles.
- Conclusion: Shape (e) contains right angles.

#### Shape (f):
- This is a parallelogram.
- None of the angles in this parallelogram are marked as right angles, and based on its structure, none of the angles appear to be 90 degrees.
- Conclusion: Shape (f) does not contain any right angles.

Final Answer:

The shapes that contain right angles are:
- (a) Square
- (b) Triangle
- (d) Triangle
- (e) Rectangle

In summary:
$$
\boxed{a, b, d, e}
$$