Browse · harp Print → jmc geometry junior Problem What is the area enclosed by the geoboard quadrilateral below? (A) 15 (B) 1821 (C) 2221 (D) 27 Solution — click to reveal Divide the shape up as above. Area=[DEGF]+[ABD]+[BCE]−[AFH]−[CGH]=4⋅10+21⋅1⋅3+21⋅7⋅6−21⋅5⋅4−21⋅6⋅10=40+23+21−10−30=2221 Final answer C ← Previous problem Next problem →
