Geometry Circles Vocab

A secant is...

• Two parallel lines going through a circle

• A line going through the circle

• Three lines going through a circle

• A line that intersects a circle at two points

External Tangent:

• A tangent that is common to two circles and does not intersects the segment joining the centers of the circles

• A tangent that is common to two circles and intersects the segment joining the centers of the circles

Click anything that is true about Inscribed Angle

• An obtuse angle inside a circle

• The angle measure of the inscribed angle is 1/2 of the intercepted are

• An angle whose vertex is the center of a circle

• An angle whose vertex is on a circle and whose sides contain chords of the circle.

Central Angle is ...

• An angle whose vertex is the center of a circle

• An angle whose vertex is on a circle and whose sides contain chords of the circle.

• An obtuse angle inside a circle

• The angle measure of the central angle is 1/2 of the intercepted are.

Angle Between 2 Chords:

• Equal to 1/2 the sum of the two intercepted arcs

• 
• Equal to 1/2 the difference of the two intercepted arcs

• 

Angle KLM is half of its intercepted arc. Determine the supplement to angle KLM.

• 130 degrees

• 50 degrees

• 65 degrees

• 115 degrees

Determine the missing value. Segments that appear to be tangent are tangent. Round answer to the nearest tenth, as needed. (Hint: a tangent to a diameter creates a right angle.)

• 8.8 units

• 13.6 units

• 18.4 units

• 12.4 units

The center of the circle is (h,k). (x-h)^2 + (y-k)^2 = r^2 Write the equation of the circle shown.

• (x+1)² + (y + 3)² = 2

• (x - 1)² - (y -3)² = 4

• (x - 1)² + (y - 3)² = 4

• (x + 1)² - (y+3)² = 2

Which segments are NOT radii?

• segment EB

• segment CD

• segment AG

• segment AC

Tangents from the same point are congruent. Calculate the perimeter of the triangle. Assume that lines which appear to be tangent are tangent. Units are in cm and should be included in your answer.

• 75 cm

• 45 cm

• 58 cm

• (39 + 6x) cm