Circles project
Updated: 6/7/2020 This storyboard was created with StoryboardThat.com

#### Storyboard Text

• Today class, five student will be presenting their theorem of choice.
• Please be sure to take notes an all the presentations
• The theorem I chose to present is the central angle theorem
• The central angle theorem states that an angle in a circle which has its vertex at the circles center and touches the edge of the circle is equal to the angle of the opposite arc.
• Angle = Arc
• 90°
• 90°
• The theory I decided to present is the inscribed angle theorem
• The angle measurement of the arc opposite the vertex is double the angle measurement of the vertex.
• When the vertex of an angle is on the circumference of a circle and the two legs are also on the circumference, this is when you apply the inscribed angle theorem.
• Angle = 1/2Arc
• Y
• 27°
• 54°
• The theorem I chose to present is the tangent chord theorem.
• This theorem is when a tangent and chord meet at a point on the circles circumference. The angle at which these points meet is half of the angle measurement of the opposite arc.
• 86°
• 43°
• I will be explaining the tangent-tangent theorem.
• This theorem proves that two tangents drawn from the same point to a circle’s circumference are equal in length
• 6”
• 6”
• To finish the presentations, I will be talking about the tangent-secant theorem.
• The formula is the secant squared is equal to the whole tangent multiplied by the part of the tangent not inside the circle.
• The tangent-secant theorem proves that you can find the length of the tangent or secant using this formula
• Z*Z=X(X+Y)
• X
• Z