Question

I need help with surface area

Answer 1

Answer: The area of the triangular prism is 120 millimeter square.

Step-by-step explanation:

In the figure the net of the triangle contains two congruent triangles and three different rectangles.

Area of triangle is,

`A=(1)/(2)* (base)* (height)`

Area of a triangle is,

`A_1=A_5=(1)/(2)* 12* 5=30`

Area of a rectangle is.

`A=l* b`

The area of rectangles are,

`A_2=2* 13=26`

`A_3=2* 5=10`

`A_4=2* 12=24`

Total area of triangular prism is,

`A=A_1+A_2+A_3+A_4+A_5`

`A=30+26+10+24+30=120`

Therefore the area of the triangular prism is 120 millimeter square.