What ia the distance between the points (-4, -8) and (10, -8)

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?

How do i do this activity, is appreciated

For the inequality |c| < |d| to be true, which of the following must be true?