1-6 Practice: Two-Dimensional Figures - Calculate perimeter and circumference of various shapes.

It looks like you've uploaded a worksheet titled "1-6 Practice: Two-Dimensional Figures", which includes several geometry problems involving identifying and calculating properties of 2D shapes.

Since I can't view images directly, I’ll need you to describe the content of the image or provide the text of the problems. However, based on the title and typical structure of such worksheets, here's what this type of practice usually involves:

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Common Topics in "Two-Dimensional Figures" Practice:

1. Identifying Shapes: Recognizing polygons (e.g., triangles, quadrilaterals, circles).
2. Classifying Triangles: By sides (scalene, isosceles, equilateral) or angles (acute, right, obtuse).
3. Classifying Quadrilaterals: Squares, rectangles, parallelograms, trapezoids, rhombuses.
4. Finding Perimeter and Area:
- Rectangle: \( P = 2(l + w),\ A = l \times w \)
- Triangle: \( A = \frac{1}{2} \times b \times h \)
- Circle: \( C = 2\pi r,\ A = \pi r^2 \)
5. Using Properties: Like symmetry, angle sums, side lengths.

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Example Problems You Might See:

Let’s assume your worksheet has these types of questions:

#### Problem 1: Identify the shape
> Name the figure shown:
> [Image of a rectangle]

✔ Answer: Rectangle

#### Problem 2: Find the perimeter
> A rectangle has length 8 cm and width 5 cm. Find the perimeter.

✔ Solution:
\( P = 2(l + w) = 2(8 + 5) = 2 \times 13 = 26 \) cm

#### Problem 3: Find the area
> A triangle has base 10 m and height 6 m. What is its area?

✔ Solution:
\( A = \frac{1}{2} \times b \times h = \frac{1}{2} \times 10 \times 6 = 30 \) m²

#### Problem 4: Classify the triangle
> A triangle has two equal sides and one angle of 90°.

✔ Answer: Isosceles right triangle

#### Problem 5: Circle calculations
> A circle has radius 7 cm. Find the circumference and area.

✔ Solution:
Circumference: \( C = 2\pi r = 2 \times \pi \times 7 \approx 43.98 \) cm
Area: \( A = \pi r^2 = \pi \times 49 \approx 153.94 \) cm²

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How to Solve These Problems:

1. Read carefully – Note given dimensions and what is being asked.
2. Use formulas – Memorize key formulas for perimeter, area, etc.
3. Label parts – Especially helpful with triangles and composite figures.
4. Check units – Ensure all measurements are in the same unit.

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👉 Please describe the specific problems from the image (e.g., “Find the area of a triangle with base 12 and height 8”) or type out the questions, and I’ll solve them step-by-step with explanations!