405 In^2
The formula for area of a triangle is 1/2Bh. One half of the area of the base times height, because base times height is a square and triangles are half a square. Let's solve for the area now.
A=1/2Bh
Plug in our information
A=1/2(30)(27)
Multiply parentheses.
A=1/2(810)
Multiply by 1/2 or divide by two.
A=405
The area of the triangle is 405 inches squared.