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Let's work through the problems shown in the image you uploaded.

### Part 1: Identify Triangles and Quadrilaterals
- **Instructions**: Write "T" for triangles and "Q" for quadrilaterals.

1. Shape 1: Triangle (T)
2. Shape 2: Triangle (T)
3. Shape 3: Triangle (T)
4. Shape 4: Quadrilateral (Q)
5. Shape 5: Quadrilateral (Q)

### Part 2: Fill in the Blanks
1. **The diameter of a circle is _twice_ its radius.**
   - Explanation: The diameter is the full distance across the circle through the center, which is twice the radius.
   
2. **The _diameter_ is the longest chord of a circle.**
   - Explanation: The diameter is a straight line passing from one side of a circle to the other through the center, making it the longest possible chord.

3. **The length of a circle is called its _circumference_.**
   - Explanation: The circumference is the perimeter or the distance around the circle.

4. **The radius of a circle is 5 cm. Its diameter is _10 cm_.**
   - Explanation: As established earlier, the diameter is twice the radius, so 5 cm × 2 = 10 cm.

5. **A square has _4_ lines of symmetry.**
   - Explanation: A square can be folded along 4 axes (two diagonals, one horizontal, and one vertical) where both sides match perfectly.

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Would you like further details or have any questions about these concepts? Here are some related questions to think about:

1. What are the properties that differentiate a triangle from a quadrilateral?
2. Can a shape have more than 4 sides and still be a polygon? Why?
3. How do you find the circumference of a circle if the diameter is given?
4. What is the relationship between the area and circumference of a circle?
5. How many lines of symmetry does a rectangle have, and why?

**Tip**: When using a compass to draw circles, always ensure the pivot point (center) stays steady to get perfect circles.

Write T for triangles and Q for quadrilaterals. Fill in the blanks about basic geometrical concepts.

Solve this geometry exercise to identify triangles and quadrilaterals. Learn about circle properties, diameter, and symmetry, and test your understanding with fill-in-the-blank questions. Suitable for Grade 5 students.

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