# Geometry Formulas for the PRAXIS® Core Academic Skills for Educators Mathematics Test

If you were struggling with the geometry section on the PRAXIS Core Academic Skills for Educator: Mathematics Test, we have good news for you. Its importance dropped from 20% to 12% of the questions in the test. There will be a set of geometric formulas that you will be able to use during the test as well. But that doesn’t mean you have to be careless about geometry on the test. It can represent the difference between passing and failing, or between passing and acing it.

That’s why we have compiled the following formula chart for you. Here you will find the essentials to succeed at geometry on the PRAXIS Core Academic Skills for Educator: Mathematics Test (5733).

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Number and Quantity Formulas for the PRAXIS Core Academic Skills Test

## Geometry Formulas for the Praxis Mathematics Test

Category Formula Symbols Comment
Circles $$C = 2 \cdot \pi \cdot r$$
$$C = \pi d$$
C = circumference (perimeter) of a circle
r = radius
d = diameter
Provided during
the test
Circles $$s = r \cdot \theta$$ s = arc length
r = radius
$$\theta$$ = central angle (in radians)

Circles $$A = \pi r^2$$ A = area of circle
r = radius
Provided during
the test
Quadrilaterals $$P = 4 \cdot s$$ P = perimeter of a square
s = length of a side

Quadrilaterals $$P = (2 \cdot l)+(2 \cdot w)$$ P = perimeter of a rectangle
l = length of rectangle
w = width of rectangle

Quadrilaterals $$A=s^2$$ A = area of a square
s = side length

Quadrilaterals $$A= l \cdot w$$ A = area of a rectangle
l = length
w = width
Provided during
the test
Triangles $$P = s_1 + s_2 + s_3$$ P = perimeter of a triangle
$$s_n$$ = side length

Triangles $$A = \frac{1}{2} b \cdot h$$ A = area of a triangle
b = base
h = height
Provided during
the test
Rectangular
Prism
$$V = l \cdot w \cdot h$$ A = volume of a rectangular prism
l = length
w = width
h = Height
Provided during
the test