Answer:
Step-by-step explanation:
Remark
The red triangle has 1/3 the side length of the blue triangle. So the quick answer is the missing side of the blue triangle is 66
Now no one marking this, if they require work is going to accept that quick line of reasoning, so what you have to do is set up a proportion.
Equation (proportion)
57/19 = x / 22 Cross multiply
Solution
57*22 = 19 * x Divide by 19
57*22/19 = x Divide 19 into 57 (which is 3)
3 * 22 = x
x = 66
