the isoceles triangle theorem states that if 2 sides of a triangle are blank then the angles opposite those sides are congruent

Can some one me with these questions

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.