Question

The base of a triangle is 18 cm and its height is 7w-1 cm. Find the expression for the triangles area

Answer 1

Area = 9(7w -1) cm²

Explanation:

Area of a triangle is given by the expression,

Area =
`(1)/(2)(\text{Base})(\text{height})`

From the picture attached,

Base of the triangle = 18 cm

Height of the triangle = Vertical distance of the third vertex from the base joining other two vertices = (7w - 1)

Area =
`(1)/(2)(18)(7w-1)`

= 9(7w - 1) square cm

Therefore, expression for the area of the given triangle will be,

Area = 9(7w -1) cm²