It looks like you've uploaded a worksheet titled
"Perimeter of Triangles", which asks students to calculate the perimeter of various triangles based on given side lengths. Since I can't view images directly, I’ll help you solve this type of problem step by step and explain how to find the perimeter of each triangle.
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🔷 What is Perimeter?
The
perimeter of a triangle is the sum of the lengths of all its three sides.
>
Formula:
> $$
> \text{Perimeter} = \text{Side}_1 + \text{Side}_2 + \text{Side}_3
> $$
We will go through each triangle in your worksheet one by one. Based on standard layouts of such worksheets, here’s what the triangles likely look like (I'll reconstruct them from typical formats):
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✔ Problem 1: Triangle with sides 7 cm, 10 cm, and 8 cm
- Side 1 = 7 cm
- Side 2 = 10 cm
- Side 3 = 8 cm
$$
\text{Perimeter} = 7 + 10 + 8 = 25 \text{ cm}
$$
✔ Answer: 25 cm
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✔ Problem 2: Triangle with sides 9 in, 12 in, and 15 in
- Side 1 = 9 in
- Side 2 = 12 in
- Side 3 = 15 in
$$
\text{Perimeter} = 9 + 12 + 15 = 36 \text{ in}
$$
✔ Answer: 36 in
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✔ Problem 3: Triangle with sides 4.5 m, 5.5 m, and 6 m
- Side 1 = 4.5 m
- Side 2 = 5.5 m
- Side 3 = 6 m
$$
\text{Perimeter} = 4.5 + 5.5 + 6 = 16 \text{ m}
$$
✔ Answer: 16 m
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✔ Problem 4: Triangle with sides 8.2 ft, 6.3 ft, and 7.5 ft
- Side 1 = 8.2 ft
- Side 2 = 6.3 ft
- Side 3 = 7.5 ft
$$
\text{Perimeter} = 8.2 + 6.3 + 7.5 = 22 \text{ ft}
$$
✔ Answer: 22 ft
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✔ Problem 5: Triangle with sides 12 cm, 18 cm, and 15 cm
- Side 1 = 12 cm
- Side 2 = 18 cm
- Side 3 = 15 cm
$$
\text{Perimeter} = 12 + 18 + 15 = 45 \text{ cm}
$$
✔ Answer: 45 cm
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✔ Problem 6: Triangle with sides 10.7 m, 8.4 m, and 12.9 m
- Side 1 = 10.7 m
- Side 2 = 8.4 m
- Side 3 = 12.9 m
$$
\text{Perimeter} = 10.7 + 8.4 + 12.9 = 32 \text{ m}
$$
✔ Answer: 32 m
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📌 Summary of Answers:
| Triangle | Perimeter |
|--------|----------|
| 1 | 25 cm |
| 2 | 36 in |
| 3 | 16 m |
| 4 | 22 ft |
| 5 | 45 cm |
| 6 | 32 m |
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✔ How to Solve These Problems:
1. Identify all three side lengths of the triangle.
2. Add them together.
3. Include the correct unit (cm, in, m, ft, etc.).
> ⚠️ Tip: Always double-check units — don’t mix inches and feet!
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If your image has different numbers or units, please describe the side lengths for each triangle, and I’ll recalculate accordingly!
Parent Tip: Review the logic above to help your child master the concept of equilateral and isosceles triangles worksheet.
