In terms of exam technique your biggest problems were in parts 5, 10 and 11 i.

In question 4 you said radians was . However radians is so that

.

Note that your answer should have been less than … [-4]

In question 5 you correctly said that

.

To solve this you do as follows:

m.

You did some “voodoo moving” and got an answer of 19.15 m. You made a serious error then — -you didn’t ask yourself if your answer made sense. The hypotenuse — by definition the longest side in a right-angled-triangle — you found to be 19.15 m. Yet there was a side of length 25 m? Your answer had to be bigger than 25 m as the hypotenuse is the longest side. [-8 in total]

For question 6 you incorrectly assumed that all the sides had the same length. This is only true if all the angles are equal.

You could have used

,

on the top ‘wedge’ to find (the angles opposite the equal sides are equal so are both ):

[-12]

For question 10 you correctly calculated the length of the arc. However you forgot to add on the two radii so your answer should be 13.44 cm + 7 cm + 7 cm but you only had 13.44 cm. Perhaps you didn’t read the question properly? [-16 ]

For question 11 i. you failed to read the question properly: the answer was supposed to be given correct to the nearest whole number. Perhaps this was harsh. [-16.5]

For question 11.i you correctly find that … but not even close to . The calculator might have helped you to find

. [-17.5]

In question 12 you found the area of the circle to be but never halved this to find that the area of the semi-circle is . [-18.5].

In question 13 you rounded 3.007 to 3 to two decimal places. To two decimal places, 3.007 rounds to 3.01. [-19]

Regards,

J.P.