Question

I need help on question 5

4. In triangle ΔABC, AB≅BC An altitude is drawn from B to AC and intersects always true?
1) ∠ABD≅∠CBD
2) ∠BDA≅∠BDC
3) AD≅BD
4) AD≅DC
5. In ΔEFG, IF is a median, GE=3 x+5 and I E=x+6. Find x.

Answer 1

4. 1), 2), 4) are true

5. x = 7

Explanation:

In question 4.

1), 2), and 4) are true

Triangles ABD and CBD are congruent by AAS. Then by CPCTC, 1) and 4) are true. 2) is true by definition of altitude and all right angles are congruent.

5.

Your drawing is good.

Since IF is a median, then IE = IG = (1/2)GE

IE = (1/2)GE

x + 6 = (1/2)(3x + 5)

2x + 12 = 3x + 5

-x = -7

x = 7