Foundation June 2018 Paper 2 Q7
7 In the diagram, AB is parallel to DC.
Not to scale
Work out angle BDC.
Give a reason for each angle you work out. [4]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| angle BDC = 44 | 2 | B1 for angle ABD = 44 or angle ADC = 100 or M1 their BDC = their ABD | Notation not required but values need to be identified eg the angle must be named or the value written in the correct place in the diagram or for BDC, on the answer line Ignore answer line if angle BDC is identified correctly in working If BDC is only correctly labelled on the diagram max B1 scored |
| correct reasons leading to angle BDC = 44 | 2 | two marks for [co-]interior angles [add up to 180] or allied angles [add up to 180] or angles between parallel lines [ add up to 180] OR one mark for each relevant reason (maximum of two) from [angles in a] triangle [add up to] 180 alternate [angles are equal] corresponding [angles are equal] angles on a straight line [add up to] 180 | Reasons must be correct for their method leading to angle BDC = 44. 180 may be implied in these reasons by a correct calculation |