In this chapter we're going to learn you how to calculate the area of a triangle, circle and parallelogram and the circumference of a circle. To see how much you already know, there are some exercises below. Try to solve them, without looking at the solutions!

1. Copy and fill in.

a. 43 m = ... dm

b. 5.8 km = ... m                      

c. 491 m = ... cm

d. 1.2 m = ... mm

e. 27 m = ... km

f. 855 mm = ... m 

g. 16000 cm = ... km

h. 18.8 cm = ... m

2. Use the information given to calculate the length of the unknown side in the following triangles.

a. ΔA = 90^o, AB = 6 and AC = 15          c. ΔR = 90^o, PQ = 30 and QR = √704

b. ΔB = 90^o, KL = 24 and KM = 25           d. ΔW = 90^o, VW = 1.6 and WX = 7.4 

Solutions: http://mathexplanations.jouwweb.nl/chapter-11/answers