Isosceles Trapezoid

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materi mat dalam bahasa inggris... :D

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Isosceles Trapezoid

  1. 1. GROUP MATHEMATIC ISOSCELES TRAPEZOID MEMBER IN GROUP: CLARA RIA D KARINA RAHMAWATI MONITA SYAFA’ATI SEVI MERLINDA WIDYASTIKA FAURANI (13) (18) (21) (25) (26)
  2. 2. QUADRILATERALS  A quadrilateral is a 2-dimensional closed shape with four straight sides. E.g. The shape ABCD shown here is a quadrilateral.  A line segment drawn from one vertex of a quadrilateral to the opposite vertex is called a diagonal of the quadrilateral. AC is a diagonal of quadrilateral ABCD, as is BD.
  3. 3. PROPERTIES OF QUADRILATERALS  Four sides (or edges)  Four vertices (or corners).  The interior angles add up to 360 degrees:  Try drawing a quadrilateral, and measure the angles. They should add to 360°
  4. 4. TYPES OF QUADRILATERALS There are seven types of quadrilaterals that can be divided into two groups: parallelograms and other quadrilaterals.
  5. 5. RECTANGLES means "right angle" and show equal sides  A rectangle is a four-sided shape where every angle is a right angle (90°).  Also opposite sides are parallel and of equal length.  And a vast is p×l and the arround is equal to sides
  6. 6. RHOMBUS  A rhombus is a four-sided shape where all sides have equal length.  Also opposite sides are parallel and opposite angles are equal.  Another interesting thing is that the diagonals (dashed lines in second figure) of a rhombus bisect each other at right angles.  Rectangles, squares and rhombuses (or diamonds) are parallelograms
  7. 7. SQUARE means "right angle" show equal sides  A square has equal sides and every angle is a right angle (90°)  Also opposite sides are parallel.  A square also fits the definition of a rectangle (all angles are 90°), and a rhombus (all sides are equal length).
  8. 8. PARALLELOGRAM  sides are parallel and equal in length, and opposite angles are equal (angles "a" are the same, and angles "b" are the same) NOTE: Squares, Rectangles and Rhombuses are all Parallelograms!
  9. 9. KITE  Two pairs of adjacent sides of a kite are equal in length  One pair of opposite angles (the ones that are between the sides of unequal length) are equal in size.  One diagonal bisects the other.  Diagonals intersect at right angles.
  10. 10. TRAPEZOID Trapezoid Isosceles Trapezoid  A trapezoid (called a trapezium in the UK) has one pair of opposite sides parallel.  It is called an Isosceles trapezoid if the sides that aren't parallel are equal in length and both angles coming from a parallel side are equal, as shown. Language Note: In the US a "trapezium" is a quadrilateral with NO parallel sides!
  11. 11. THANK YOU... BYE BYE......... BYE.. FRIENDS

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