Question

The triangle has been reduced by a scale of
1
5
. 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?

(
1
2
) (25.5)(30) (
1
5
) = 76.5cm²

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

mc001-1.jpg
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.