If you make an identical copy of a triangle, rotate the copy 180 degrees and combine the two triangles, you will form a . A
parallelogram

B
bigger triangle

C
trapezoid

D
cube

the formula for the equation of a circle is (x – h)2+ (y – k)2 = r2, where (h, k) represents the coordinates of the center of the circle, and r represents the radius of the circle. if a circle is tangent to the x-axis at (3,0), this means it touches the x-axis at that point.