Line segments xy and zy are tangent to circle o.

which kind of triangle must triangle xyz be?

a) an equilateral triangle
b) an isosceles triangle
c) a scalene triangle
d) a right triangle

Combine points X and O to get segment XO and combine points Z and O to get segment ZO. Segments XO and ZO are radii of the given circle, then they are congruent. Thus, the triangle XOZ is isosceles, that gives you .

Since segments XY and YZ are tangent to the circle, then .

Consider angles ∠ZXY and ∠XZY:

.

Taking into account that

,

you have

.

If twoo angles adjacent to the side are congruent, then this side is a base of isosceles triangle.

correct choice is B.

1. d.90

2. e. none of these (80)

3. a. 0

4. b. 6

5. e. none of these (10)

6. a. 5

y = 5x + 17

step-by-step explanation:

a perpendicular line will be the opposite reciprocal slope of the given equation.   the slope given is -1/5 so the opposite reciprocal is 5

find b:

7 = 5 (-2) + b

7 = -10 + b

17 = b

write equation

y = 5x + 17