Answer:
450cm^2
Step-by-step explanation:
There are 4 triangles with 2 of each.
Triangle =[tex]\frac{1}{2}bh[/tex]
Triangle 1 = [tex]\frac{1}{2}(10)(15) = \frac{1}{2}(150) = \frac{150}{2} =75 *2=150[/tex]
Triangle 2 = [tex]\frac{1}{2} (15)(20)=\frac{1}{2}(300)=\frac{300}{2} = 150*2=300[/tex]
300 + 150 = 450
