Question

Can someone help me with these problems? I'm not sure how to do them and I have to turn it in tomorrow.

Answer 1

sure what problems

Answer 2

Hello! I'm definitely willing to try! What's the first question? ^_^

Answer 3

what are your questions?

Answer 4

i cant really read the first one

Answer 5

Question, on the first question, reason #2, how do you know it's the definition of midpoint? Point C hasn't been mentioned as the midpoint of line BD

Answer 6

perpendicular is the opposite of parallel. so if parallel is like a parallelogram, and its like a train track. what would perpendicular mean?

Answer 7

I feel like <ACB \(\cong\) <ECD would be in the second spot since that's also a given.

Answer 8

@sleepyjess I don't know what i'm doing, I tried looking for examples online and i guessed.

Answer 9

ans easy way to remember perpendicular is: imagine a big lowercase t

Answer 10

Okay, normally all of the "Given"s will be in the first couple of slots

Answer 11

or cross

Answer 12

In the second picture, would the Statement #2 be AC BD for definition of perpendicular?

Answer 13

We already used AC perpendicular to BD, perpendicular means there will be right angles somewhere. Where do you think there would be right angles knowing that AC is perpendicular to BD?

Answer 14

angle c?

Answer 15

or would it be angle 1 and angle 2

Answer 16

with perpendicular lines, @sleepyjess they don't always have to have right angles in them. just a thought

Answer 17

Perpendicular means that there will be right angles

Answer 18

not how I learned it in school and I am in 11th grade geometry

Answer 19

and my twin is in AP pre calculous

Answer 20

I took precal in 10th grade,
A line is perpendicular to another if it meets or crosses it at right angles (90°). Perpendicular means "at right angles". A line meeting another at a right angle, or 90° is said to be perpendicular to it.

http://www.mathopenref.com/perpendicular.html

Answer 21

these can be perpendicular lines, and they don't cross at 90 degrees.....

Answer 22

Those are not perpendicular lines

Answer 23

im not going to fight. But being in a house full of smart mathletes that compete in competitions and win... I know what they are....

Answer 24

what is the isosceles triangle theorem?

Answer 25

Sorry about that jcr, would you like to continue with the problems?

Answer 26

yes please

Answer 27

This is what I found about it:
Isosceles Triangle Theorems. The Base Angles Theorem. If two sides of a triangle are congruent, then the angles opposite those sides are congruent. Converse of the Base Angles Theorem.
http://www.mathwarehouse.com/geometry/congruent_triangles/isosceles-triangle-theorems-proofs.php

Answer 28

I've actually never heard of that...

Answer 29

Are we doing #50 right now?

Answer 30

yes, #50

Answer 31

Okay, we're looking for 2 angles that are 90 degrees, on line BD

Answer 32

angle 1 and angle 2

Answer 33

Yes! So for the statement on #2, it will be <1 \(\cong\) <2

Answer 34

Okay. for 3. would it be reflexive?

Answer 35

Now we have to figure out something that will make triangle ABD isosceles...

Answer 36

Sides AB and AD are congruent. Would that be part of it? because isosceles has two = sides

Answer 37

I feel like the statement is going to be AB \(\cong\) AD, but I'm not sure of the reason

Answer 38

Okay, so what about #5? Im not sure on that one

Answer 39

I honestly am just going around in circles with this....

Answer 40

This is what I have for markings on the picture