Answer:
1 : 5
Step-by-step explanation:
Ratio is used to show the relationship between two amounts. It tells how many one value is contained within another value. Ratio can be used to compare the size of two or more numbers in relation to each other.
The comparison between this two numbers or quantities is done and expressed by division.
Ratio of triangles to squares = number of triangles : number of squares
Ratio of triangles to squares = 4 : 20
Ratio of triangles to squares = 1 : 5