Geometry7th Grade

MathMs. Casazza

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Triangle Square RectangleRhombus

ParallelogramCircle

Pentagon Hexagon

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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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