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30 Cards in this Set
- Front
- Back
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Two flat surfaces intersect to form a ? |
line |
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A flat surface is a ? |
plane |
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Two lines intersect to form a ? |
point |
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Two points determine a ? |
straight line |
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How many lines can be drawn through a given point? |
infinitely many |
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What is the point that divides a line segment into two equal parts? |
midpoint |
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Two line segments are equal when their end points can be made to ? |
coincide |
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A limited portion of a line is called ? |
a line segment or a segment |
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The intersection of any two lines is a ? |
point |
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A flat surface with length and width but no thickness is a ? |
plane |
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The shortest distance between two lines is a ? |
straight line |
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If a>b and b>c, then a ? c |
> |
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The line through the vertex of an angle which divides the angle into two equal angles |
Angle Bisector |
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Lines that from right angles are called ? |
Perpendicular |
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Two angles sharing the same vertex and a common side between them are called ? |
Adjacent angles |
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An acute angle has how many degrees? |
less than 90 degrees |
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A right angle has how many degrees? |
90 degrees |
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An obtuse angle has how many degrees? |
over 90 degrees and less than 180 degrees |
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Two angles are complementary if their sum is what ? |
A right angle (90 degrees) |
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Two angles are supplementary if their sum is what ? |
180 degrees or a straight angle |
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The two angles shown are called ? |
Vertical angles |
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The sum of the angles of a triangle is ? |
180 degrees |
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The line drawn from any vertex of a triangle to the midpoint of the opposite side is called a ? |
median |
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The perpendicular line drawn from a vertex of a triangle to the opposite side is called a ? |
altitude |
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A triangle with no 2 sides equal is called ? |
A scalene triangle |
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A triangle with all 3 sides equal is called ? |
An equilateral triangle |
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A triangle with 2 sides equal is called ? |
An isosceles triangle |
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A triangle containing a right angle is called ? |
A right triangle |
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In a right triangle, the side opposite the right angle is called the ? |
hypotenuse |
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A triangle with 3 equal angles is called a ? |
equilateral triangle |
