I think, I'd go with A) Always true. As 2 points is always the line. If you add third one, it will be collinear.
2 * 4 = 8
8 < 11 is true
2 * 5 = 10
10 < 11 is true
2 * 5.3 = 10.6
10.6 < 11 is true
2 * 5.7 = 11.4
11.4 < 11 is NOT true.
x = 5.7 is not a solution.
Answer:
9
Step-by-step explanation:
BECAUSE 54 : 2,3,9. and 45 : 5,9. so the greatest common factor is 9
∠BDC=30, so ∠CBD + ∠BCD=180-30=150
ΔDBC is isosceles, so ∠CBD=∠BCD=half of 150=75
∠ABC=∠ABD-∠CBD=155-75=80
ΔABC is isosceles, so ∠ABC=∠ACB=80
∠BAC=180-80-80=20
1) They are both right angle triangles
2) AE = BE
AB = AE + BE
AE = 4.2cm
AB = 4.2 + 4.2
AB = 8.4cm
