Question

If <1 is congruent to <2, then

Answer 1

http://tinypic.com/r/n2lso2/6

1. 3 is congruent to 4
2. <3 and <4 are complementary
3. ray BD is perpendicular line AC
4. <5 and is congruent to <8
5. segment AD is congruent to segment DC

Answer 2

pic is not available

Answer 3

If <1 is congruent to <2, and <1 and <2 are a linear pair, then

x+x = 180

2x = 180

x = 180/2

x = 90

So angles 1 and 2 are both equal to 90 degrees

Answer 4

Probably more useful is just the fact that angle 1 is 90 degrees

you can use this to get your answer