Geometry Chapter 12
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| If a line through the center of a circle is perpendicular to a chord, | then it bisects the chord.
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| If a line through the center of a circle bisects a chord that is not a diameter | then the line is perpendicular to the chord.
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| If a line through a chord of a circle is the perpendicular bisector of the chord, | then the line passes through the center of the circle.
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| Chord | A line segment with both endpoints on a circle
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| Diameter | A chord that contains the center of a circle
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| Arc | A portion of a circle
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| Tangent | A line is tangent to a circle if it lies in the plane of the circle and touches the circle at exactly one point.
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| Minor arc | an arc that is less than half of a circle
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| Major arc | An arc that is more than half of a circle
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| Semicircle | An arc that is exactly one half of a circle
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| Central angle | an angle with its vertex at the center of the circle
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| Reflex angle | An angle that is larger than 180
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| Equal chords of a circle have | equal arcs
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| Equal arcs of a circle have | equal chords
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| Inscribed angle | an angle with its vertex on a circle and its two sides intersecting the circle at two other points.
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| The measure of an inscribed angle in a circle is | half the measure of its intercepted arc.
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| If two inscribed angles intercept the same arc, | then the two angles are equal.
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| If an angle is inscribed in a semicircle, | then it is a right angle.
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| Secant | a line that intersects a circle (or other curve) in two points.
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| Secant angle | An angle made from two secants
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| The measure of a secant angle is related to | the measures of the arcs that the angle intercepts.
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| Tangent line | touches the circle at one point
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| Tangent segment | A segment of a tangent line with one of its endpoints on the circle
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| The two tangent segments from a point outside a circle are | equal to each other
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| The product of the lengths of the segments of one chord equals | the product of the lengths of the segments of the
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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akikoandpoog
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