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| A closed, plane (two dimensional) shape formed by segments that meet at their endpoints is called a ______________________________. Examples are triangles, quadrilaterals and hexagons. |
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| Draw a kite shaped polygon on your paper somewhere. Notice that if you draw a segment connecting any two non-adjacent vertices that the segment only passes through the interior. We would classify the kite as a(n) ______________________________. |
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If you connect points O and Y on the figure below with a line segment. The segment will pass through the exterior of POLY. For that reason we would classify POLY as a(n) ______________________________.
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| A polygon is ______________________________ if and only if all of its interior angles have the same measure. |
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| In pentagon TIGER, TI = IG = GE = ER = RT. TIGER is a(n) ______________________________ polygon. |
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| A particular hexagon has six sides of the same length and six angles of the same measure. We would classify this hexagon as a(n) ________________________________________. |
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| center (of a regular polygon) |
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Definition
Because point F is equidistant from points A, B, C, D and E, we could classify it as the ________________________________________ of ABCDE.
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| central angle (of a regular polygon) |
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Definition
| The vertex of a(n) ________________________________________ lies at the polygon's center, and its sides pass through adjacent vertices of the polygon. |
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| interior angle (of a polygon) |
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Any angle on the inside of a polygon that is formed by two segments that define the polygon is called a(n) ______________________________. |
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| exterior angle (of a polygon) |
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Definition
Because adjacent angles HAR and RAY are supplementary, we would classify angle HAR as a(n) ________________________________________ of HARLEY.
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Two lines intersect to form a 90º angle. We refer to them as _____________________________. |
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| If line m and line n are in the same plane but end up never intersecting, we say that they are ______________________________. |
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______________________________ is a measure of how steep a line is. |
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| If point J is on segment PQ such that PJ = JQ, then we refer to J as the ______________________________ of PQ. |
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Because they share a side, but don't overlap, we refer to angles XNT and TNO as ____________________.
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When two lines intersect they form four angles. A pair of those angles that are opposite each other are known as ______________________________. |
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One angle measures 47°, and another measures 43°. Based on their sum, we would refer to them as ______________________________. |
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One word to describe two angles whose sum is 180 degrees is "______________________________."
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Line AB intersects segment EG at point F, cutting segment EG into two equal parts. Line AB is called the ______________________________ of segment EG. |
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Not only does a ________________________________________ divide a segment into two congruent segments, it also makes a 90 degree angle with the segment. |
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Draw an angle in the space below this question. Now draw a ray that starts at the angle’s vertex and divides the angle into two congruent angles. ________________________________________ is the name we give to this ray. |
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Mrs. Bruning observes several boys simply stuffing handouts into their backpacks. Based on her observation, she says, “Boys stuff handouts into their backpacks.” Mrs. Bruning has just made a(n) ______________________________ about the behavior of boys. |
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We proved that the sum of the interior angles of a triangle is 180 degrees. So the underlined statement is a(n) ______________________________. |
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When you use deductive logic to write an argument that a statement is true, we call that argument a(n) ____________________. |
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The polygon below is a(n) _______________.
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| In triangle ABC, angle A is a right angle. Segment BC would be the _______________ of triangle ABC. |
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| Points P, E, N, T and A in Pentagon PENTA are referred to as its _______________. |
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In the diagram below, segment AC is a(n) _______________ of pentagon ABCDE.
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| The word _______________ comes from the Latin words for "four" and "side" and refers to a four-sided polygon. |
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| In a diagram, two sides of a quadrilateral are marked as being parallel. All we can say about the figure is that it is a(n) _______________. |
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| If a quadrilateral has two pairs of parallel sides, then we call it a(n) _______________. |
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| If a quadrilateral is equiangular, then each angle must measure 90° because 360°÷ 4 = 90°. Such quadrilaterals are called _______________. |
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You know that the figure below is a(n) _______________ based on the information given in the diagram.
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| A regular quadrilateral is also known as a(n) _______________. |
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| Right ∆ABC has two congruent legs. Therefore we also refer to it as a(n) ______________________________. |
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| legs OR legs of an isosceles triangle |
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Definition
| The congruent sides of an isosceles triangle are referred to as ______________________________. |
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| In triangle ABC, segments AB and AC are congruent. We refer to angle BAC as the ______________________________. |
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| In isosceles triangle ABC, segments AB and AC are congruent. We refer to segment BC as the isosceles triangle’s ______________________________. |
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| We call the angle formed by the congruent sides of an isosceles triangle the “vertex angle.” The other two angles are called ______________________________ |
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| Each of the two sides that make up the right angle in a right triangle is referred to as a(n) ______________________________. |
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| Two figures are ______________________________ if and only if they are the same size and shape. |
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| We use the word “______________________________” to refer to a theorem that can easily be derived from another theorem. |
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| alternate interior angles |
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| If two non-adjacent angles on the interior of two lines cut by a transversal are on opposite sides of that transversal, then we refer to them as ______________________________ angles. |
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| same-side interior angles |
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Angles 1 and 2 are between lines l and m, and they are on the same side of line p. We refer to them as __________.
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