-343 I think but I am not totally sure
From the diagram, we are given that triangle ABC and triangle ADC shares the same side AC, so it means both triangles have one congruent side.
We are also given that angle BAC and angle DAC are equal.
If we want to prove the triangles congruent using Angle-Angle-Side congruent postulate, we need to see one angle in each triangle that is congruent. We will need the information either: ACB = ACD or ABC = ADC
Correct answer: fourth option
Hello,
The answer should be 15a^2 - 15
This picture should explain the steps.
Hope this helps!!
Brainliest?
0 because the -x cancels out the ones negative and 1 x 2 is 2. And 2-2 is 0
