Calculating the area of a leaning triangle

Calculating Area

Draw a rectangle (or square) around the triangle The area of this rectangle = 1 square The triangle is ½ of the rectangle so its area = ½ square Area of triangle = ½ square

Calculating Area What about this triangle?

Calculating Area Draw a rectangle around the triangle The area of this rectangle = 2 squares

Calculating Area The area of the triangle can be calculated by taking away the area of the 2 white triangles

Calculating Area The area of the first white triangle = ½ square

Calculating Area The area of the second white triangle is ½ of the surrounding rectangle

Calculating Area The area of the surrounding rectangle = 2 squares So the area of the second white triangle = 1 square

Calculating Area So the area of the triangle = 2 - ½ - 1 = ½ square Area of triangle = ½ square

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