What are the theorems we can use?
Probably the most relevant is the angle at a point on the circle subtended by a chord has a measure equal to half the arc indicated by the chord.
By the theorem,
angle AEB = angle ADB = (1/2) arc AC = (1/2) 110 = 55 deg
angle BAE = angle DBE = (1/2) arc DE = (1/2) 130 = 65 deg
angle BKD + angle KDB + angle DBK = 180 deg
angle BKD + angle ADB + angle DBE = 180 deg
angle BKD = 180 - 55 - 65 = 60 degrees
Answer: 60 degrees
The triangles are congruent due to SAS
Well it's not really a matter of which is "best", one is right and the others are wrong :)
is an <em>irrational</em> number, meaning that it can't be expressed with a fraction between integers: in other words, there doesn't exist two integers such that
This is why option B is wrong. Also, imaginary numbers (option C) are complex numbers with no real part. Since
is not imaginary. Finally, irrational numbers are real numbers, so option D is wrong as well.
You simply have to multiply
if there is 7 apples on monday
and 3 times as many/x
7x3=21