A triangle has base 13 feet and an altitude of 7 feet. What is its area.

(1/2)x13x7 = 45.5 square feet

To find the area of a triangle, use this formula: Area = 1/2 base * height.

A = 1/2bh

A = 1/2 * 13 * 7
A = ?

To find the area of a triangle, you can use the formula A = (base * height) / 2. In this case, you have the base and the height (altitude), so you can substitute these values into the formula.

A = (13 feet * 7 feet) / 2
A = 91 square feet.

Therefore, the area of the triangle is 91 square feet.