A Kite is a flat shape with straight sides.
Đang xem: Geometry kite definition
It has two pairs of equal-length adjacent (next to each other) sides.
It often looks likea kite!
|Two pairs of sides|
Each pair is two equal-length sides that are adjacent (they meet)
|The angles are equal where the two pairs meet|
|Diagonals (dashed lines) cross at right angles,and one of the diagonals bisects (cuts equally in half) the other|
Play with a Kite:
Areaof a Kite
Multiply the lengths of the diagonals and then divide by 2 to find the Area:
Area = p × q2
Example: A kite has diagonals of 3 cm and 5 cm, what is its Area?
Area = 3 cm × 5 cm2 = 7.5 cm2
Multiply the lengths of two unequal sides by the sine of the angle between them:
Area = a × b × sin(C)
Example: You don”t want to get wet measuring the diagonals of a kite-shaped swimming pool. So you measure unequal side lengths of 5.0 m and 6.5 m with an angle between them of 60°. What is its Area?
|Area||= a × b × sin(C)|
|= 5.0 × 6.5 × sin(60°)|
|= 5.0 × 6.5 × 0.866…|
|= 28.1 m2 (to 1 decimal)|
If you can draw your Kite, try the Area of Polygon by Drawing tool.
Perimeter of a Kite
The Perimeter is the distance around the edges.
The Perimeter is 2 times (side length a + side length b):
Perimeter = 2(a + b)
Example: A kite has side lengths of 12 m and 10m, what is its Perimeter?
Perimeter = 2 × (12 m + 10 m) = 2 × 22 m = 44 m
Rhombus and Square
When all sides have equal length the Kite will also be a Rhombus.