Why are the triangles congruent?

Which statement best describes a square? a. a special rectangle that has four right angles b. a special trapezoid that has four sides of equal length c. a special rectangle that has four sides of equal length d. a special trapezoid that has four right angles

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2

What is the sum of the first 8 terms of the geometric series