#### The slope of a line parallel to y-axis is

(a) 0

(b) 1

(c) -1

(d) not defined

**Solution:**

#### The slope of a line which makes an angle of 30° with the positive direction of x-axis is

(a) 1

(b)

(c) √3

(d)

**Solution:**

**More Solutions:**

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- It is given that ∆DEF ~ ∆RPQ.
- Find the lengths of the remaining sides of the triangles.