What Triangle Congruence Postulate would you use to show the triangles in the diagram are congruent?

An eight-sided die, which may or may not be a fair die, has four colors on it; you have been tossing the die for an hour and have recorded the color rolled for each toss. what is the probability you will roll a brown on your next toss of the die? express your answer as a simplified fraction or a decimal rounded to four decimal places.

Solve for x where 0 equation: cot^2x+2cotx+1=0

Atriangle has side lengths of x, x+11, and 3x+5. what is the perimeter?