Ben mowed 5/6 of his lawn in one hour. john mowed 4/6 of his lawn in one hour who mowed less of his lawn in one hour

Urgent? will give brainliest given that the blue triangle is a right triangle, which expression correctly gives the area of the red square? a) a2 + b2 b) a2 - b2 c) a2 - c2 d) c2 - a2