Rana is trying to draw the side elevation of the solid prism from the direction of the arrow.
Here is her answer on a centimetre grid.
(a) Explain why Rana’s side elevation is not correct. (1)
(b) On the centimetre grid below, draw a plan of the solid prism.(2)
Mark scheme (a)
Answer
Mark
Mark scheme
Explanation
C1
for explanation
Acceptable examples The height of the rectangle / it should be less than 4 cm The 4 cm sides are wrong / too long The height of the rectangle should be 2.6… / \(\sqrt{7}\) She’s drawn the slanted height / not used the perpendicular height The height is smaller / not 4cm / wrong It should be shorter as the side is at an angle It should be on an angle, so the height is smaller The length / width / side is 4cm not the height She’s drawn the face / the length and side / width of the rectangle She’s drawn the length and side / width not the (length and the) height
Not acceptable examples The rectangle should be wider The rectangle should be 6 squares high It doesn’t tell us the height It should be smaller It’s the front not the side It’s not on a slant / it should be on a slant It goes up at an angle / it doesn’t go straight up The length of the prism is 4 cm The length / width / side of the rectangle is 4 cm Side elevation is at a slant (not straight up)
Mark scheme (b)
Answer
Mark
Mark scheme
M1
for a 7 cm by 6 cm rectangle or for a 7 cm by \(n\) cm or \(m\) cm by 6 cm rectangle and dividing line which is parallel to the 7 cm or the \(m\) cm side
