quadrilateral (segi empat)

Quadrilateral

1. Saraswati Nirmala Suci (24)2. Indah Arfina Maharani (13)3. Regita Mulia Winjari (22)4. Repo Nursaputra (23)

KITEFigure of a Kite

Understanding Kite

A kite is formed by combining two isosceles triangles whose bases are equal in length and coincident.

The Properties of Kite

1. Has one axis of symmetry2. A pair of opposite angles equal3. Diagonal perpendicular berpotongn4. An angle equal to the diagonal split5. Can occupy the frame with two way6. Two pairs of adjacent sides of equal length

Formula for the area of a kiteArea of a kite = ½ diagonal x (the other) diagonalExample

D1 = 5 cmD2 = 7 cm

So, the area is (5 × 7) = 35 = 17.5 cm2 2

Formula for the Perimeter of a Kite

Perimeter = Side + side + side + sideExample

AAB = AD = 4 cm

B D BC = CD = 6 cm

C

So, perimeter of kite ABCD is 4 + 4 + 6 + 6 = 20 cm.

Rhombus

Figure of a Rhombus

Understanding RhombusA rhombus is formed by

combining an isosceles triangle and its image which is reflected in respect to the base of the triangle.

The Properties of Rhombus

All sides of a rhombus are equal in length,each of the two diagonals in every rhombus is an axis of symmetry,in every rhombus the opposite interior angles are equal in measure and are bisected by the diagonals.

Formula for the Area and Perimeter of a Rhombus

Area = ½ diagonal x (the other) diagonalPerimeter = Side + side + side + sideExample A

B D AB = BC = CD = DA = 5 cmAC = 7 cm

C BD = 9 cm

Area = (7 × 9) : 2 = 31.5 cmPerimeter = 4 (5) = 20 cm

SquareFigures of a Square

Understanding Square

Square is figures whose each interior angle fit into the position of their other angle and that can fit their frame in eight ways.

The Properties of Square

• All four sides equal in length• Large number of corner angle of 360 degrees• The two diagonals intersect perpendicularly

bisects the length and• Four sides is a right angle elbow

Formula for the Area and Perimeter of a Square

Area = Side × sidePerimeter = 4 × side

Example

Any Question?

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