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Geometry7th Grade
MathMs. Casazza
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Triangle Square RectangleRhombus
ParallelogramCircle
Pentagon Hexagon
Click on one of the shapes to know more about it
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Triangle• A triangle has three sides.• To find the area of the
triangle you use this formula
• -1/2bh *the b stands for base and the h stands for height
• The Pythagorean theorem helps to find missing angle or side of a right triangleThe Pythagorean theorem is: a2 + b2 = c2
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Square• A square has four equal
sides and angles.• To find the area of the
square use the formula: area = s2
• To find the perimeter of the square use this formula: perimeter = 4s
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Rectangle
• A rectangle has four sides.• To find the area of a
rectangle use this formula: Area= length * width
• To find the perimeter of a rectangle use this formula: perimeter=2length*2width
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Rhombus• A rhombus has four sides
that are the same length.• To find the area of a
rhombus use this formula: area= base * height
• To find the perimeter of a rhombus use this formula: Perimeter=4S(S= sides)
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Parallelogram• A parallelogram has four
sides that are parallel.• To find the area of a
parallelogram use this formula: Area= base *height
• To find the perimeter of a parallelogram use this formula: perimeter=2(base *Side)
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Circle• A circle has no sides.• To find the area of a
circle use this formula: Area= PI r2
• To find the perimeter of a circle use this formula perimeter =PI x diameter or 2PI *radius.
• The perimeter of a circle is also known as the circumference.
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Pentagon• A pentagon has
five sides.• To find the area of
a pentagon use this formula: Area= S2N/4tan (PI/N)]– S= sides– N= number of
sides• To find the
perimeter of a pentagon use this formula Perimeter = 5*length of the sides.
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Hexagon• A hexagon has six
sides.• To find the area of a
hexagon use this formula: Area =(3√3/2 )r2
• To find the perimeter of a hexagon use this formula: Perimeter =6r
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Quiz• What shape has the formula for perimeter=
2bs• Square
• Parallelogram
• Circle
Good try but its not the right answer
• The perimeter formula for a square is 4s.• GOOD TRY!
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quiz
Good try but its not the right answer
• The perimeter for a circle is also known as circumference
• PI x diameter or 2PI * radius• Good try
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quiz
CORRECT!!!!!
• The perimeter formula for a parallelogram is 2bs where the b stands for base and the s stands for side.
• You got it right!!!!
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Thank You!
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