Can someone help me on this Proofs problems? It's just number one and two.

See Explanation

Step-by-step explanation:

1. By interior angle sum Postulate of a triangle.

From equations (1) & (2), we find:

Hence proved

2. In is exterior angle.

Therefore, by remote interior angle theorem, we have:

From equations (1) & (2), we find:

is an isosceles triangle.

Thus proved.

5/12, or 5: 12

step-by-step explanation:

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!