Question

Example of ar:

If DE is a perpendicular bisector of ΔA B C, then D E⊥B C and B E≅C E.
8. Solve for x.
2 x+12 5 x-15
Answer: x=______
9. Solve for x.
8x-63 4x-27
Answer: x=______
10. Solve for x.
(you are working with degrees here!)
(3x-18)°
Answer: x=______
11. Solve for x.
(you are working with degrees here!)
(8x+2)°
Answer: x=______

Answer 1

Question 8

`2x+12=5x-15\\\\12=3x-15\\\\27=3x\\ \\ x=9`

Question 9

`8x-63=4x-27\\\\4x-63=-27\\\\4x=36\\\\x=9`

Question 10

`3x-18=90\\\\3x=108\\\\x=36`

Question 11

`3x+8x+2=90\\\\11x+2=90\\\\11x=88\\\\x=8`