Begin with a brief introduction to perimeter and area using real-life examples like parks and garden plots.

1. Begin with a brief introduction to perimeter and area using real-life examples like parks and garden plots.

2. Group activity: Students measure classroom items to calculate the perimeter and area of triangles and parallelograms.

3. Individual task: Create a poster showcasing a triangle and parallelogram, including formulas and a practical application scenario.

# Grade 7 Math Quiz: Perimeter and Area of Parallelograms and Triangles

**Name: ___________________________**  
**Date: ____________________________**

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**1. What is the formula for the area of a parallelogram?**  
   A) Base × Height  
   B) 2 × (Base + Height)  
   C) Base × Base  
   D) (Base + Height) × 2  

   Answer: _______________

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**2. A triangle has a base of 10 cm and a height of 5 cm. What is its area?**  
   A) 25 cm²  
   B) 50 cm²  
   C) 15 cm²  
   D) 30 cm²  

   Answer: _______________

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**3. If the perimeter of a parallelogram is 36 cm and the lengths of the two different sides are 10 cm and 8 cm, what is the length of one of the sides?**  
   A) 18 cm  
   B) 10 cm  
   C) 8 cm  
   D) 12 cm  

   Answer: _______________

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**4. Which of the following shapes has an area calculated by the formula (Base × Height) ÷ 2?**  
   A) Parallelogram  
   B) Rectangle  
   C) Triangle  
   D) Trapezoid  

   Answer: _______________

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**5. A parallelogram has a base of 12 cm and a height of 7 cm. What is its area?**  
   A) 84 cm²  
   B) 42 cm²  
   C) 24 cm²  
   D) 14 cm²  

   Answer: _______________

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**6. If the sides of a triangle measure 3 cm, 4 cm, and 5 cm, what is the perimeter of the triangle?**  
   A) 12 cm  
   B) 10 cm  
   C) 14 cm  
   D) 15 cm  

   Answer: _______________

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**7. How do you find the perimeter of a parallelogram?**  
   A) Add the lengths of all sides  
   B) Multiply the base by the height  
   C) Add the lengths of two adjacent sides and multiply by 2  
   D) Use the formula (Base + Height) × 2  

   Answer: _______________

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**8. A triangle has an area of 30 cm² and a base of 6 cm. What is its height?**  
   A) 5 cm  
   B) 10 cm  
   C) 6 cm  
   D) 4 cm  

   Answer: _______________

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**Answer Key:**

1. A  
2. A  
3. B  
4. C  
5. A  
6. A  
7. C  
8. A  

### Lesson Plan: Perimeter and Area of Parallelogram and Triangle

**Grade Level:** 7  
**Subject:** Math  
**Duration:** 60 minutes  

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**Curriculum Standards:**
- Calculate perimeter and area of parallelograms and triangles.
- Apply formulas to solve real-life problems.

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**Materials:**
- Whiteboard and markers  
- Rulers  
- Graph paper  
- Worksheets with practice problems  
- Calculator (optional)  
- Visual aids (posters of parallelograms and triangles)

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**Objectives:**
1. Understand the formulas for the perimeter and area of parallelograms and triangles.
2. Calculate the perimeter and area for given shapes.
3. Apply knowledge to solve real-world problems involving these shapes.

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**Structure:**

1. **Introduction (10 minutes)**  
   - Begin with a brief review of polygons.
   - Introduce parallelograms and triangles with definitions and real-life examples.

2. **Direct Instruction (15 minutes)**  
   - Present the formulas for perimeter and area:
     - Parallelogram: Area = base × height; Perimeter = 2(base + side)
     - Triangle: Area = (base × height) / 2; Perimeter = sum of all sides
   - Use visual aids to illustrate each shape.

3. **Guided Practice (15 minutes)**  
   - Solve a couple of example problems as a class.
   - Students use rulers and graph paper to draw one parallelogram and one triangle, then calculate perimeter and area.

4. **Independent Practice (15 minutes)**  
   - Distribute worksheets with various problems on perimeter and area.
   - Students work individually to solve problems, applying the formulas discussed.

5. **Wrap Up (5 minutes)**  
   - Review key formulas and concepts.
   - Discuss common errors and clarify doubts.
   - Assign homework for further practice.

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**Assessment:**
- Monitor student understanding during practice sessions.
- Collect worksheets to evaluate comprehension.  

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### Total Duration: 60 minutes

Lesson Robot

Perimeter and Area of parallelogram and triangle

Lesson Plan

Assessment