Workout
Question 1
a) x=3cm b) x=10cm c) x=13cm
Question 2
a) x=9.43cm b) x=32.31cm c) x=9.23m
d) x=5.48cm e) x=43.05mm f) x=14.01yds
Question 3
a) x=1.6m or 160.cm b) x=59.9mm or 6.0cm c) x=2.1m or 211.9cm
Question 4
a) x=5cm b) x=8cm c) x=7cm
Question 5
a) x=6.24cm b) x=15.20cm c) x=14.39km
d) x=0.98mm e) x=94.47cm f) x=0.92miles
Question 6
a) x=7.21cm b) x=9.75cm c) x=18.83cm d) x=2.14km
e) x=37.10m f) x=21.02cm g) x=1.98cm h) x=19.67cm
i) x=13.08mm or 1.31cm j) x=13.60cm or 136.01mm
k) x=3.38m or 338.23cm l) x=134536.24cm or 1.35km
Question 7
a) no b) yes c) no
Apply
Question 1: 8.87m
Question 2: 7.07cm
Question 3: a) 56cm b) 84cm2
Question 4: 21.54cm
Question 5: 186.82miles
Question 6: 47.4cm
Question 7: a) 8.77cm b) 17.55cm2
Question 8: 43.30cm2
Question 9: 11.31cm or 22.80cm
Question 10: 12.92cm
Question 11: 12ft and 13ft
Question 12: Last line should read x=20cm NOT 200cm
Question 13: Third line should read 25 + x2 = 169 (she has squared incorrectly)
Then x2 = 144
x = 12cm
Question 14: He has labelled the sides the wrong way, c should be the longest side (25cm)
Second line should read 49 + x2 = 625
Then x2 = 576
x = 24cm