and 5cm (±2mm) Consistent use of scale 1 cm to 100m B3 max (-1 MR) B1 Construction arcs for perp. Bisector Two sets of intersecting arcs centres A and C B1 Perp. Bisector of AC (±2mm) B1 Line 2cm (±2mm) from path B1 Correct region shaded B1 [5] M86. (a) (i) 40 B1 (ii) 140 or 180 (their x) – Do not ft if answer = 140 in (a)(i) B1 ft (b) Logical and precise explanation (either written or as calculation) B1 for 1 angle labelled or stated correctly, no reason B2 (c) 24 ÷ 8 × 2 or OP = 6 M1 3.14) × (their 6)2 π(or M1 36π or 36 × or × 36 π π allow π36
and 5cm (±2mm) Consistent use of scale 1 cm to 100m B3 max (-1 MR) B1 Construction arcs for perp. Bisector Two sets of intersecting arcs centres A and C B1 Perp. Bisector of AC (±2mm) B1 Line 2cm (±2mm) from path B1 Correct region shaded B1 [5] M86. (a) (i) 40 B1 (ii) 140 or 180 – (their x) Do not ft if answer = 140 in (a)(i) B1 ft (b) Logical and precise explanation (either written or as calculation) B1 for 1 angle labelled or stated correctly, no reason B2 (c) 24 ÷ 8 × 2 or OP = 6 M1 π(or 3.14) × (their 6)2 M1 36π or 36 × π or π × 36 allow π36
AllUnit3QnsandmarkschemeWordversion.docx