Actually, the area of a triangle is a = bh/2. If a = 30 and b = 12:



So he height is 5 units
Answer:
Step-by-step explanation:
a) = 46.2 X 10∧-1
=0.462
b) = 5.7 x 10∧-6
= 0.00057
Edited in the comment ............
R/12 is the solution because it is how many times you can put r into 12