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MathematicsMathematics
21 September, 07:42

Maggie found the area of the irregular figure by dividing it into a triangle and a rectangle.

Her work is shown below.

Area of rectangle = bh = (6 cm) (5 cm) = 30 Centimeters squared

Area of triangle = bh = (2 cm) (3 cm) = 6 Centimeters squared

Area of entire figure = 30 Centimeters squared + 6 Centimeters squared = 36 Centimeters squared

Which best describes the error that Maggie made?

She didn't use the correct formula for the area of the triangle.

She didn't use the correct formula for the area of the rectangle.

She didn't find the dimensions of the triangle correctly.

She didn't combine the areas of the triangle and the rectangle correctly.

+1
Answers (2)
  1. 21 September, 08:03
    0
    She didn't use the correct formula for the area of the triangle.

    I took the quiz
  2. 21 September, 08:09
    0
    "She didn't use the correct formula for the area of the triangle."

    Step-by-step explanation:

    Area of rectangle is base * height

    Area of triangle is (1/2) * base * height

    Now,

    area of rectangle is 6 * 5 = 30

    Area of triangle is 6

    Sum would be 30 + 6 = 36, this is correct.

    But, looking closely, we see that Maggie used the formula for triangle incorrectly, it should be (1/2) * b * h so the area would be "3" sq. cm.

    So, area of total figure would be:

    30 + 3 = 33 sq. cm., NOT 36 sq. cm

    Her area of triangle is wrong! Error made is:

    "She didn't use the correct formula for the area of the triangle."
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