Polygons

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TRIANGLES
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TRIANGLES
THE SUM OF THE ANGLES OF A TRIANGLE IS 180
DEGREES.
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Classifying Triangles
Classifying triangles according to the measure of
the angles of the triangle.
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Acute Triangles
All 3 angles measure less than 90 degrees.
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Right Triangle
One angle measures 90 degrees and the other
two angles are acute.
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Obtuse Triangle
One angle that measures more than 90 degrees and
the other two are acute.
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Classifying Triangles
Classifying triangle according to the length of
the sides of the triangles.
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SCALENE
The lengths of the sides are not congruent.
The lengths are not equal in size.
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ISOSCELES
The lengths of two sides are congruent.
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EQUILATERAL
The lengths of all three sides are equal in size
which means they are congruent.
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CONGRUENT TRIANGLES
Congruent triangles are triangles that are equal
in size and shape. They have the same length of
the sides and have the same measure of the
angles.
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S A S
Side Angle Side
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S S S
Side Side Side
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A S A
Angle Side Angle
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Polygons
A polygon is a many sided closed figure.
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POLYGONS
Triangle-3 sided Quadrilateral-4 sided Pentagon-5
sided Hexagon-6 sided
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Polygons
Heptagon--7sided Octagon--8 sided Nonagon--9
sided Decagon--10 sided
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Polygons
Undecagon--11 sided Dodecagon--12 sided A
regular polygon has equal sides.
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QUADRILATERALS
SQUARE
ALL SIDES ARE CONGRUENT OPPOSITE SIDES ARE
PARALLEL. 4 RIGHT ANGLES
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RECTANGLES
OPPOSITE SIDES ARE CONGRUENT AND PARALLEL. 4
RIGHT ANGLES.
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PARALLELOGRAM
OPPOSITE SIDES ARE CONGRUENT AND PARALLEL
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OPPOSITE SIDES ARE PARALLEL. ALL SIDES ARE
CONGRUENT.
RHOMBUS
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Trapezoid
Has 2 parallel lines.