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Transcript of Welcome to my presentation
WELCOME TO MY PRESENTATION
BE THE BEST STUDENT TODAY
TRAPEZOID
PRESENTED BY :MOCH. FATHUL
HILAL
Keep your spirit class…
Hai hai hai hai hai
Do you know about Trapezoid?
Names of Trapezoid
Scalene trapezoid
Isosceles trapezoid
Right trapezoid
Properties of Trapezoid The sum of consecutive angle
between two parallel sides are 180O
Isosceles Trapezoid :- The length of diagonals are equal- The base angle are equal- The length of sides (not parallel
sides) are equal
Definition of Trapezoid A trapezoid is a quadrilateral with
exactly one pair of parallel sides.
Perimeter of Trapezoid Formula to calculate perimeter of
trapezoid
P = a + b + c + d
Why ?
Area of Trapezoid Formula to calculate area of
trapezoid
A = 1/2 x (a + b) x t
Why ?
Exercise 1 Determine the perimeter and area of
trapezoid below!
A B
CD
10 cm 6 cm
12 cm
E
Exercise 2 Mr. Karyo has a land which shape is
isosceles trapezoid. The length of its parallel sides are 100 m and 30 m. A part of the land will be sold, such that remaining the square land with 30 m in length . If the price for the land is Rp 75.000/m2 , then how much money will be got by Mr. Karyo?
Exercise 3 One of the parallel sides of a trapezoid
is twice the other. The height of the trapezoid is the average of the parallel sides. If the area of trapezoid is 324 cm2, find the lengths of the height and parallel sides of the trapezoid!
Exercise 3 Determine height, and parallel sides of
trapezoid below! A = 324 cm a = 2b t = (a + b) /2
A B
CD
t cm
b cm
a cm
Exercise 4 The proportion of two parallel sides of
isosceles trapezoid are 2 : 5. Given an angle of one leg trapezoid is 60 degrees.The length of leg = 10 cm, height = 8 cm, and the Area = 80 cm.
Determine : All angle of trapezoid The length of parallel sides Perimeter of trapezoid
Conclusion
THANK YOU