Formula sheet for volume and surface area
AREA AND VOLUME FORMULAS Areas of Plane Figures Square Rectangle Parallelogram s s b w l h 2A = s A = l • w A = b • h Triangle Trapezoid Circle h b h b 1 b 2 r d A = ½ b • h 2 A = ½ (b 1 + b 2) • h A = πr (π ≈ 3.14 or ) Circumference: C = 2πr = πd Formula Sheet. Grade 9 Academic. Triangle Trapezoid Parallelogram Circle Rectangle. Geometric Shape Perimeter Area. w l P = l + l + w + w. or. P = 2 (l + w) A = lw P = b