Answer:
33 Cm
4x6 is 24
to find the top (triangle) You have to use A= height and base divided by 2.
Basically multiply like a square and divide by two
For the explanation I multiplied 6 by 4 (24 Cm) for the first part and then multiplied (3x6)/2 (9 Cm) for the second part giving me a total of 33 Cm.
