Answer:
x = 7, arc DE = 198°
Step-by-step explanation:
Inscribed angles from the same arc are congruent.
∠ DCE and ∠ DWE are inscribed angles from the same arc DE , thus
12x + 15 = 3x + 78 ( subtract 3x from both sides )
9x + 15 = 78 ( subtract 15 from both sides )
9x = 63 ( divide both sides by 9 )
x = 7
Thus
∠ DCE = 12x + 15 = 12(7) + 15 = 84 + 15 = 99°
The inscribed angle DCE is half the measure of its intercepted arc, thus
arc DE = 2 × 99° = 198°
3/11 as a decimal is .27 repeating that means it has a line over the two and the seven but if you want to round it would be .3
Answer:
Ightt
Step-by-step explanation:
The 3 angles of a triangle add up to 180 degrees. If all 3 sides are different in length then the angles are also different.
Its choice 1
