Question

Using complete sentences, explain how the formula for the area of kite PQRS is derived.

Answer 1

an inspection of your figure shows that the kite is actually composed of two triangles SPQ and SRQ. The area of a triangle is equal to 1/2 base times height. For these triangles the area would be 1/2 d1 1/2 d2 as 1/2 d2 is the height the area of the kite would be their sum

Answer 2

2(1/4) d1 d2=1/2 d1 d2
A=1/2(d1)(d2)sq units