Answer:
x = 71.937 ft or 72 ft
Perimeter = 187 ft
Area of triangle = 1260 ft²
Step-by-step explanation:
Pythagorean Theorem
a^2 + b^2 = c^2
a = 35
b = x
c = 80
35^2 + x^2 = 80^2
x^2 = 5175
x = 71.937 ft or about 72 ft
Perimeter = a + b + c = 35 + 72 + 80 = 187 ft
Area of triangle =1/2*base*height= 1/2(72)(35) = 1260ft^2
