Question

The net of an isosceles triangular prism is shown here. What is the surface area, in square units, of the triangular prism?

A.94 units^2
B.98 units^2
C.129 units^2
D.136 units^2

Answer 1

Answer: 136 Units^2

Step-by-step explanation: I don't have a good explantion, but I did this back in 6th grade, and got it correct!

Answer 2

First, area of the middle rectangle: 6*7=42 unit^2
Top rectangle = 5*7 = 35 units
bottom rectangle = 5*7 = 35 units
Area of each end (triangle) = base * height/2 = 6*4/2= 12
Total area of ends = 2 * 12 = 24

Surface of prism (= area of net)
= 42+35+35+12+12
= 136 unit^2