Ratio and proportion in geometry I

Maths

State the ratio between the side lengths AB and BC.

State the constant of proportionality between triangle ABC and triangle DEF.

Fill in the gap: If two quantities are in the same ratio then there are _______ relationships I can use to find a missing value.

Lots of the same groups of yellow and red counters are put in a bag. Fill in the missing value in the ratio table.

Yellow and red counters are in the ratio 2 : 3. What fraction of the counters are yellow?