Mathematics

• What is a variable?

  A variable is the letter in a equation.
• What is a leading coefficient?

  Leading coefficient is the whole number in the start of the equation.
• What is substitution?

  Replacement
• is a segment whose endpoint are any two points on the circle

  Chord
• is a connected part of portion of a circle.

  Arc
• is an angle formed by two radii of a circle with its vertex in the center of the circle.

  Central angles
• Is an angle whose vertex is on the circle and whose sides are chord of the circle.

  Inscribed angle
• Is a segment that joins the center of the circle to a point on a circle.

  Radius
• Is a chord which passes through the center at a circle.

  Diameter
• Half of a circle

  Semi circle
• Less than half a circle

  Minor arc
• More than half circle

  Major arc