2021 Math Kangaroo Levels 9-10 Problem #25

2021 Math Kangaroo Levels 9-10 Problem #25 25. The smaller square in the picture has area 16 and the gray triangle has area 1. What is the area of the larger square? (A) 17 (B) 18 (C) 19 (D) 20 (E) 21 Thank you for watching and please subscribe if you’d like to see more videos!