Find the area of the triangle (5.4cm)base
(2cm) height
dotted lines to make it a right triangle

One of the many ways to solve the area of a triangle is to divided by two the product of its base (b) and height (h). Which can be expressed as,
 
                                                   A = (b x h) / 2

Substituting the given base and height to the equation,
                                   
                                           A = (5.4 cm x 2 cm) / 2 = 5.4 cm^2

Therefore, the area of the triangle is 5.4 cm^2.

You can find the area of a rectangle by multiplying the length and height. so multiply 1/2*7/4(which is the simpler version of 1 3/4) and you get 7/8 as your answer.