It is like when you have the problem 15*6, you don't know how to do that mentally, unless you use the take ten strategy which would turn it into (10*6) + (5*6) so, it simplifies to (60) + (30) which is 90
9514 1404 393
Answer:
q/2, p, q
Step-by-step explanation:
You know the area of a triangle is half the product of base and height. The two triangles of interest here have base length p and height q/2. You're being asked to fill in the missing base or height dimension.

So this can be rewritten as 2/4(4a+b)-1/4(4ab) so this can be simplified more easily, 2/4-1/4=1/4. The simplified version is 1/4(4a+b)
check the picture below.
make sure your calculator is in Degree mode.