Foundation November 2019 Paper 1 Q20
20
(a) Are these two triangles definitely congruent?
Give a reason.
Give a reason.
Not to scale
.................. because .................. [1]
(b) Prove that these two triangles are congruent.
Not to scale
[3]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| Accept any correct reason e.g. No as lengths are unknown or lengths may be double each one or triangles are similar | 1 | See exemplars in appendix | |
Appendix
Exemplar responses for Q20a
| Response | Mark |
|---|---|
| No, lengths unknown | 1 |
| No, lengths may be different | 1 |
| No as triangles are similar | 1 |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| First correct reason | 1 | Reasons are Angle [I]G[H] = angle [L]J[K] | Reasons can be given in any order Allow same angle, (36), but lines must be identified |
| Second correct reason | 1 | GH = JK | |
| Third correct reason and SAS | 1 | GI = JL | |