Review - Prerequisite to Unit Circle

Review - Prerequisite to Unit Circle

Mr. Rusty C. Millabas

Multiple Choice

Which of the following shows the correct signs of x and y value on each quadrant of the Cartesian plane?

• Quadrant I (+, +)

  Quadrant II (+, -)
  Quadrant III (-, -)
  Quadrant IV (-, +)

• Quadrant I (+, +)

  Quadrant II (-, -)
  Quadrant III (+, -)
  Quadrant IV (-, +)
  

• Quadrant I (+, +)

  Quadrant II (+, -)
  Quadrant III (-, +)
  Quadrant IV (-, -)
  
  

• Quadrant I (+, +)

  Quadrant II (-, +)
  Quadrant III (-, -)
  Quadrant IV (+, -)
  

Multiple Choice

Which of the following is the standard equation of the circle?

• $\left(x-h\right)^2+\left(y-k\right)^2=r^2$

• $x^2+y^2=1$

• $y=mx+b$

• $ax^2+bx+c=0$

Equation of the Circle in Standard Form

Isosceles Triangle Theorem

If two sides of a triangle are congruent, then angles opposite those sides are congruent.

Equilateral Triangle

If a triangle has three congruent angles, then it must have three congruent sides.

Every equilateral triangle is also equiangular.

Fill in the Blanks

Central Angle and Its Intercepted Arc

The angle measure of the central angle is congruent to the measure of the intercepted arc.