Area of a rhombus
What is a rhombus?
Watch this video to find out exactly what a rhombus is.
Look at the demonstration below in order to find out the area formula for a rhombus
Use the slider to change the side lengths of the rhombus. Use point C to change the angles. Use the sliders to reflect all four triangles. Then answer the questions below
Answer these questions in your workbook under the heading:
Area of a Rhombus (Online Activity)
1. What shape does the rhombus and the four triangles form?
2. What is the length of the sides of the combined figure in terms of d1 and d2?
3. Write a formula for the area of the combined figure in terms of d1 and d2.
4. Write a formula for the area of rhombus ABCD in terms of d1 and d2. (Hint: What
is the relationship of the area of the rhombus to the area of the new figure?)