1.

a
a = 5 cm
b
b = 13 cm
c
c = 12.5 cm (to 1 decimal place)
d
d = 14.1 cm (to one decimal place)

2.

a
10.6 metres from one corner to the other.
Y7_More_Measurement_ex_05.gif
b
It is 36.1 cm from one corner to the opposite corner.
c
It is 62.5 metres from one corner to the centre spot.

 

3.

a. Triangle. Area = 17.5 m2

b. Trapezium. Area = 70 cm2

c. Parallelogram. Area = 45.5 cm2

d. Parallelogram. Area = 96 cm2

e. Rhombus. Area = 96 cm2

f. Triangle. Area = 24 mm2

4.

a. Volume = 163.6 cm3 (to one decimal place)

b. Volume = 384 cm3

c. Volume = 2278.5 cm3

d. Volume = 960 cm3