I thought we didn't get the choices, but they were cropped on my screen. Let's see how I did.
Prism length L, width W, height H, volume V=LWH [they used small letters, but ok]
Parallelogram, base b, height h, area A=bh [good]
Circumference C of a circle radius r, C=2πr [bad guess,
they had diameter d, so C=πd]
Area A of a circle radius r, A = πr² [good]
Area A of a triangle, base b, height h, A = (1/2) bh [good]
Area A of a trapezoid, bases a,b, height h, A= (1/2)(a+b)h
[good, they notated it with subscripts on the base.]
Perimeter p of a quadrilateral sides a,b,c,d p=a+b+c+d
[They did a rectangle or parallelogram; I did the general quadrilateral. The answer they're looking for is 2L+2W.]
I'm guessing of course. My favorite formula for the area S of a triangle with squared sides A, B and C is
[tex]16S^2 = 4AB-(A+B-C)^2[/tex]
and I want to go to the school that puts that one on the test.
