SHAPES

 TRIANGLE – 3 SIDED SHAPE  TRI MEANS 3

TRIcycle (3 wheels) TRIlogy (3 books in the series ) (3 Horns)

 A quadrilateral is a polygon with 4 sides.  These are all quadrilaterals:

Quadriceps – 4 muscles Quadrant – 4 sections Quadruplets (4 babies)

A pentagon is a 5-sided shape. “Pent” means 5 U.S. Pentagon in Washington D.C. Pentagram – 5 pointed star

A hexagon is a 6-sided shape “Hex” means 6 Hexagram – 6-pointed star HEX nut – six sided nut (Ask Jacob) Hexapod – 6 feet

A heptagon is a 7-sided figure “Hept” means 7 Heptathlon – 7 event competition Heptadactyly– 7 fingers on 1 hand

An octagon is an 8 sided figure “Octa” means 8 Octopus – 8 legs Octamom! Octogenarian – a person who is in there 80’s

A nonagon is a 9-sided figure From the Latin word “nonus” and the Greek word enneagonon, meaning 9 Enneagram – 9 personality types

A decagon is a 10-sided shaped “Deca” means 10 Decathalon – 10 track and field events Decade – 10 years Decimal – base 10 number system

PENTAGON heptagon HEXAGON NONAGON OCTAGON DECAGON

Quadrilateral – 4 sides, 4 angles, a type of polygon Rectangle – opposite sides are congruent; has 4 right angles Square – 4 congruent sides; 4 right angles Parallelogram – opposite sides are congruent and parallel Rhombus – 4 congruent sides; opposite sides are parallel Trapezoid – only 1 pair of parallel sides

Polygon Quadrilateral Trapezoid Quadrilateral Parallelogram

Polygon Quadrilateral Parallelogram Rhombus Polygon Quadrilateral Parallelogram Rhombus Rectangle Square!

A triangle has 3 sides and 3 angles

An EQUILATERAL triangle has 3 equal sides and 3 equal angles (always 60 degrees) An ISOSCELES triangle has 2 equal sides and 2 equal angles An SCALENE triangle has NO equal sides and NO equal angles

An ACUTE triangle is a triangle with ALL angles less than 90 degrees. A RIGHT triangle is a triangle with a 90 degree angle. An OBTUSE triangle is a triangle with an angle of more than 90 degrees.

isosceles right triangle

An equilateral triangle is always…. ACUTE

In a right triangle, one of the angles is a right angle—an angle of 90 degrees. A right triangle may be isosceles or scalene. In an obtuse triangle, one angle is greater than a right angle—it is more than 90 degrees. An obtuse triangle may be isosceles or scalene. In an acute triangle, all angles are less than right angles—each one is less than 90 degrees. An acute triangle may be equilateral, isosceles, or scalene.

Draw each of the following: 1.Right isosceles triangle 2.Obtuse scalene triangle 3.An acute equilateral triangle

1.Right isosceles triangle 2. Obtuse scalene triangle 3. Acute equilateral triangles