NEED HELP ASAP I WILL GIVE BRAINLIEST The triangle has been reduced by a scale of . What is the area of the reduced tri

Question

NEED HELP ASAP I WILL GIVE BRAINLIEST
The triangle has been reduced by a scale of

. What is the area of the reduced triangle?

A large rectangle has a base of 30 centimeters and height of 25.5 centimeters. A smaller rectangle has a base of b and height of a.

Maria solved the area problem below. What was her error?

(12 ) (25.5)(30) (15 ) = 76.5cm²

Maria solved the area problem below. What was her error?

She found the perimeter.
She forgot to square the scale factor.
She forgot to multiply by One-half for the area of the triangle.
She should have divided by the square of the scale factor.

in progress 0
Adeline 2 weeks 2021-09-27T16:22:36+00:00 2 Answers 0

Answers ( )

    0
    2021-09-27T16:23:38+00:00

    Answer:

    The correct option is;

    She forgot to square the scale factor

    Step-by-step explanation:

    The parameters given are;

    Dimensions of large rectangle;

    Base = 30 cm

    Height = 25.5

    Dimensions of the small rectangle;

    Base = b

    Height = a

    The formula to find the area of scaled dimension (small triangle) is given as follows;

    Area of small triangle = (Scale factor)² × Original (or actual) area

    Whereby the area, A, of a triangle is given as follows;

    A = \dfrac{1}{2} \times Base \times Height

    The smaller triangle area, A_{small}, should therefore be given as follows;

    A_{small} =\dfrac{1}{2} \times Base \times Height \times  (scale \ factor)^2

    Plugging in the values, we have;

    A_{small} = \left (\dfrac{1}{2}  \right )\times (25.5) \times (30)\times  \left (\dfrac{1}{5}  \right )^2 = 15.3 \ cm^2

    However, from the question, we have;

    (1/2)(25.5)(30)(1/5) = 76.5 cm²

    Therefore, the correct option is that she forgot to square the scale factor.

    0
    2021-09-27T16:24:29+00:00

    Answer: It’s the second option

    Step-by-step explanation:

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