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

Fill in the Blank

What do you call a triangle with 2 sides having the same length?

Isosceles Triangle Theorem

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

Fill in the Blank

What do you call a triangle with 3 sides having the same length?

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 Blank

Given  $Arc\ BC=50\degree$  , what is the measurement of  $\angle BAC$  ?

Central Angle and Its Intercepted Arc

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