The triangle that forms is a right-angled triangle. To work out the area, you just do the base × height, all divided by 2.
Therefore, you do 5 (the base) × 4 (the height) and you get 20.
Then you divide by 2 to finish the equation and you should find that the total area of the triangle is 10 units² (20 ÷ 2 = 10).
Hope that helps :)
If it’s a negative slope A, if it’s a positive slope B
Answer:
See the explanation below.
Step-by-step explanation:

Starting from 
By putting
we have:

Answer:
9yx
Step-by-step explanation:
product means multiply.
nine, y and x
9yx