Which of the following angles are congruent?
a 30o angle and a 60o angle
a 60o angle and a 60o angle
a 60o angle and an 120o angle
none of the above

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle