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Estimate the area of the irregular figure. Each box is 1 square unit.

a) 55
b) 65
c) 35
d) 45

Estimate the area of the irregular figure. Each box is 1 square unit. a) 55 b) 65 c-example-1

1 Answer

3 votes

Answer:

In the question statement is specified that this is an irregular figure. Thus, we can round the answer to 45 squares ² . The correct answer is D. 45.

Explanation:

1. In the irregular figure we can identify:

A. A square of 5 squares length and width

B. A trapezoid whose bases measure 5 and 3 squares and its height measure 3.

C. A triangle of base 5 squares and height 4 squares

2. Let's find out the area of these three geometric figures:

A. Square

Area = 5 * 5 = 25 squares ²

B. Trapezoid

Area = (Base₁ + Base₂)/2 * Height

Area = 3 + 5/2 * 3

Area = 8/2 * 3 = 12 squares ²

C. Triangle

Area = (Base * Height)/2

Area = 5 * 4/2 = 20/2 = 10 squares ²

3. Now we can add up these areas to find out the area of the irregular figure:

Area of the irregular figure = Area of the square + Area of the trapezoid + Area of the triangle

Area of the irregular figure = 25 + 12 + 10

Area of the irregular figure = 47 squares ²

In the question statement is specified that this is an irregular figure. Thus, we can round the answer to 45 squares ² . The correct answer is D. 45.

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User NickStoughton
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