What is the area of a triangle with a height of 3cm and a base length of 2x+4cm?

Question

What is the are of a triangle with a height of 3cm and a base length of 2x+4cm

Answer 1

A = (1/2)bh

• A = area of the triangle
• b = base = 2x+4
• h = height = 3

 

A = (1/2)bh

A = (1/2)(2x+4)(3)

 

Can you finish it?  It's not a number, it's an expression in x.  The units are cm².