Answer:
20.25
Step-by-step explanation:
To find the area of a triangle you do base x height/2
9x4.5/2
40.5/2= 20.25
13 bc 100 x (13 - 3) = 100 x 10 = 1000
One is that they are all <em>real numbers</em>, or <em>rational numbers</em>.
