Proportions/ratio warm up.
YouTube Video
1) What is the ratio of circles to triangles?_________
What is the ratio of triangles to circles?_________
2) What is the ratio of circles to triangles?_________
What is the ratio of triangles to circles?_________
Are the ratios of circles to triangles the same in 1 and 2? Why?
A proportion is two equal ratios
1) Using Cross Multiplication
3 6

7 14
2) Using Equivalent fractions:
3 6

7 14
3) Using a unit rate:
Picture form: