Multiply them by eachother.
If it is a rectangle then area = base × height = 7cm × 12 cm = 84 cm². If it is a triangle (more likely given the terminology used) then area = ½ base × height = ½ × 7 cm × 12 cm = 42 cm²
If you draw a diagonal in a rectangle you get two equal triangles, each half the area of the rectangle. Area of rectangle is base x height, so half of that is ½ x base x height. QED
Divide the area by the height
The one alternative to find the area of a rectangle is when you are given the length of one diagonal and its slope.
7. Since the area of a rectangle is base x height, the base must be the area (28) divided by the height (4). 28/4 = 7
find the area of a rectangle with base 4 ft and height 4 in?
Rectangle Area of parallelogram = Base * Height Area of rectangle = Base * Height
If it is a rectangle then area = base × height = 7cm × 12 cm = 84 cm². If it is a triangle (more likely given the terminology used) then area = ½ base × height = ½ × 7 cm × 12 cm = 42 cm²
If you draw a diagonal in a rectangle you get two equal triangles, each half the area of the rectangle. Area of rectangle is base x height, so half of that is ½ x base x height. QED
A rectangle is a good, simple shape to begin with. The area of a rectangle is equal to the product of the length of its base and the length of its height. The height is a segment that is perpendicular to the base. For a rectangle, the base and height are often called the "length" and the "width", and sometimes the height is referred to as the "altitude."
Divide the area by the height
The area of rectangle is : 120.0
The one alternative to find the area of a rectangle is when you are given the length of one diagonal and its slope.
7. Since the area of a rectangle is base x height, the base must be the area (28) divided by the height (4). 28/4 = 7
Height = (Perimeter/2) - Base
rectangle
Sounds like the triangle is spread out so that (the point is at the top of the rectangle) and (the base of the triangle is the same as the base of the rectangle).Base of rectangle = base of triangleHeight of rectangle = height of triangleWrite the formulas:Area of the rectangle = (base) times (height)Area of triangle = (one half of) (base) times (height)Can you see the ratio now ?