How do you find the area of a shaded region?

To find the area of a shaded region, subtract the area of the unshaded part from the total area.

What is the area of a rectangle with a length of 8 cm and a width of 3 cm?

The area is $$A = 8 \text{ cm} \times 3 \text{ cm} = 24 \text{ cm}^2$$ .

What is the area of a circle with a radius of 2 cm?

Using the formula $$A = \text{π} \times r^2$$ , the area is $$A = \text{π} \times 2^2 = 4\text{π} \text{ cm}^2$$ .

What is the area of a rectangle with an area of 50 cm² and a width of 5 cm?

To find the length, use the formula: $$A = \text{length} \times \text{width}$$ . Thus, $$\text{length} = \frac{50 \text{ cm}^2}{5 \text{ cm}} = 10 \text{ cm}$$ .

What is the area of a circle with a radius of 4 cm?

The area is $$A = \text{π} \times 4^2 = 16\text{π} \text{ cm}^2$$ .

What is the area of a rectangle with a length of 12 m and a width of 3 m?

The area is $$A = 12 \text{ m} \times 3 \text{ m} = 36 \text{ m}^2$$ .

What is the area of a circle with a radius of 5 cm?

The area is $$A = \text{π} \times 5^2 = 25\text{π} \text{ cm}^2$$ .

What is the area of a rectangle with a length of 7 cm and a width of 2 cm?

The area is $$A = 7 \text{ cm} \times 2 \text{ cm} = 14 \text{ cm}^2$$ .

Area of 2D shapes Flashcards

Student preview

15 questions

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1.

FLASHCARD QUESTION

Front

What is the formula for the area of a circle?

Back

Tags

CCSS.7.G.B.4

2.

FLASHCARD QUESTION

Front

What is the formula for the area of a rectangle?

Back

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

3.

FLASHCARD QUESTION

Front

What is the area of a circle with a radius of 3 cm?

Back

Tags

CCSS.7.G.B.4

4.

FLASHCARD QUESTION

Front

What is the area of a rectangle with a length of 5 m and a width of 4 m?

Back

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

5.

FLASHCARD QUESTION

Front

What is the area of a circle with a diameter of 10 cm?

Back

Tags

CCSS.7.G.B.4

6.

FLASHCARD QUESTION

Front

What is the area of a triangle?

Back

Tags

CCSS.6.G.A.1

7.

FLASHCARD QUESTION

Front

What is the area of a square with a side length of 6 cm?

Back

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

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