5.3 Compare Your Answers 2

Compare your answers.

1. An original triangle (blue) and its enlargement are shown below. The scale factor is 2. Determine the area of the larger triangle.
   
   
   
   
   Method #1:
   
   Scale factor = 2
   
   

   Area of original triangle:

   The area of the larger triangle is 4.62 cm2.

   
   
   Method #2:
   Using the scale factor of 2, determine the base and height of the larger triangle.
   
   

   Area of larger triangle: The area of the larger triangle is 4.62 cm2.