Thread: A rhombus

i need to know the area of a rhombus ABCD if mLABD =60 and AB = 16 m.

find the area of rhombus ABCD if AC = 10 cm and AB = 13 cm

plz just show me how to get started, don't tell me the answer

Let the diagonals AC and BD intersect at point P.

In the first question, use trigonometry to calculate the length of BP and AP. Note that L(AP) = L(CP) and L(BP) = L(DP).

In the second question, AP is half the length of AC. Use the Pythagorean Theorem to calculate the length of BP from here.