Solve for X
x-3=4
7
Flipping an object across a line.
Reflection
4x-x
3x
This shape has three sides.
Triangle
I am three more than two.
5
0=2x+6
-3
Transforming a shape by multiplying each coordinate by the same number.
Dilation
4f-e+7f
11f-e
This shape has one edge that is equidistant from the center at all points.
Circle
I am neither positive nor negative.
0
3x-7=4x+9
x=-16
Similar
19-34g-9+5d-2
-34g+5d+8
This shape is defined as as the locus of points where the sum of distances to two fixed points is constant, but it's probably more familiar as a squished circle.
Ellipse
I am the smallest prime number.
2
x=-2
Similar shapes that are the same size are this.
x^2-2x+8-(2x^2-8)
-x^2-2x+16
This shape has nine sides.
Nonagon
I am neither prime nor composite.
1
x^2-8=1
x=+-3
Moving an object without changing its shape or size.
Rigid transformation.
7+5x^2-9x+3x(x+3)
8x^2+7
Shape
I am an irrational number needed to find the circumference and area of any circle.
Pi