basics of math

• -14

• 14

• -16

• 16

• 3

• 5

• 75

• 375

• 4

• 8

• 360

• 2880

• 3

• -3

• 9

• -9

• 15

• 25

• 150

• 250

The diagram shows a triangle ABC. Points D and E are such that AD is parallel to BC, and BE is parallel to AC. Which of the following must be true if DCE is a straight line parallel to AB?

• None of the above.

What is the sum of all the internal angles for this polygon?

• 180

• 360

• 540

• 720

Based on the diagram, if BC=3, AC=4 and BD=12, find AD.

• 5

• 13

• 25

• 169