Answer:
40
Step-by-step explanation:
This rhombus is divided into 4 triangles. UL= upper left LL= lower left UR= upper right LR= Lower Right
UL: ½bh = ½(5)(4)=10
LL: ½bh = ½(5)(4)=10
UR: ½bh = ½(5)(4)=10
LR: ½bh = ½(5)(4)=10
Add up all the areas of each individual triangle (10+10+10+10 =40) and that's your final answer.
