Answer:
b=7
area=20
a=5.66
perimeter=19.66
Step-by-step explanation:
Don't know your exact question but here goes everything:
since angle between a and b=45 degrees, b=4+3
b=7
area=(7x4)-1/2(4)(4)
area=28-8
area=20
a^2=4^2+4^2
a^2=16+16
a^2=32
a=5.66
