Hint  Answer  % Correct 

perimeter of circle  circumference  87%

electronic maths tool  calculator  85%

its area is pi r squared  circle  79%

surface area is 6l^2  cube  74%

1/sec  cosine  71%

middle  center  68%

differentiation is a big part of this  calculus  67%

pi r squared h is the formula for volume  cylinder  60%

(3,1)  coordinate  58%

1/tan  cotangent  54%

1/sin  cosecant  50%

+ c  constant  47%

bulging outwatrds  convex  45%

english word for rectangular prism  cuboid  45%

3d shape  cone  43%

a + bi  complex number  39%

for 729 it is 9  cube root  38%

descriptive of an arc  curve  35%

3 for 3x  coefficient  34%

part of circle  chord  31%

not prime  composite number  25%

a + b + c = c + a + b  commutative rule  24%

9 C 5  combination  20%

adds to 90  complementary angle  19%

z*  conjugate  19%

axes  cartesian plane  16%

lie on same line  collinear  16%

a good line of best fit?  correlation  15%

angle in the same corner  corresponding angle  10%

inverse and flip  contrapositive  3%

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