Basic College Mathematics (10th Edition)

The figure is known as a triangle. The perimeter is $5.8$ meters and the area is $1.575$ sq meters.
1. State the name of the figure: Triangle, since there are 3 sides. 2. Find the perimeter Let $P =$ the perimeter of the triangle $P = 2.1 + 2 + 1.7$ $P = 5.8$ m 3. Find the area Let $A =$ the area of the triangle $A = (base \times height) \div 2$ $A = (2.1 \times 1.5) \div 2$ $A = 3.15 \div 2$ $A = 1.575$ m$^{2}$