Answer:
x=18.7
Step-by-step explanation:
x+17+5x+10+4x-34=180
10x-7=180
10x=187
x=18.7
all angles in a trianlge add up to 180 degrees
1 : 100,000
Because there are 100cm in a m and 1000m in a km
100 x 1000 = 100,000
Answer:
5. Plane P
6. Line segment DB
7. Line CE
11. Ray BE (with an arrow on top from left to right) and Ray EC (with an arrow on top from left to right)
Answer:

Step-by-step explanation:
Consider a trapezoid GJKF with:
GH=JH (hypothesis)
FL=KL (hypothesis)
so HL is the median of trapezoid GJKF
so: HL=1/2(2.5+1.2)=1.85