Right angles are usually always 90 degrees, then if you are looking at right triangles, you have 45,45,90 degree triangles and 30,60,90 triangles
X:y
2/10 = 4/x
Cross multiply
2x X= 10x4
2x = 40
Eliminate
2x/2 = 40/2
x = 20
Find a way to turn the fraction into a whole number so it will be easier to multiply, add, etc.
Answer:
3 2/5
Step-by-step explanation:
